How to disable a html subtraction button when the value is 0?
1
So I've tried all over the internet for an answer and have been unable to come up with the correct answer.
My code:
HTML
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
JS:
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
javascript html css button
edited Nov 12 '18 at 3:03
Dacre Denny
12.3k41031
asked Nov 12 '18 at 2:59
Mr. Student.exeMr. Student.exe
103
add a comment |
1
So I've tried all over the internet for an answer and have been unable to come up with the correct answer.
My code:
HTML
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
JS:
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
javascript html css button
edited Nov 12 '18 at 3:03
Dacre Denny
12.3k41031
asked Nov 12 '18 at 2:59
Mr. Student.exeMr. Student.exe
103
add a comment |
1
1
1
So I've tried all over the internet for an answer and have been unable to come up with the correct answer.
My code:
HTML
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
JS:
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
javascript html css button
edited Nov 12 '18 at 3:03
Dacre Denny
12.3k41031
asked Nov 12 '18 at 2:59
Mr. Student.exeMr. Student.exe
103
So I've tried all over the internet for an answer and have been unable to come up with the correct answer.
My code:
HTML
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
JS:
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
javascript html css button
javascript html css button
edited Nov 12 '18 at 3:03
Dacre Denny
12.3k41031
asked Nov 12 '18 at 2:59
Mr. Student.exeMr. Student.exe
103
edited Nov 12 '18 at 3:03
Dacre Denny
12.3k41031
asked Nov 12 '18 at 2:59
Mr. Student.exeMr. Student.exe
103
edited Nov 12 '18 at 3:03
Dacre Denny
12.3k41031
edited Nov 12 '18 at 3:03
Dacre Denny
12.3k41031
edited Nov 12 '18 at 3:03
Dacre Denny
12.3k41031
12.3k41031
asked Nov 12 '18 at 2:59
Mr. Student.exeMr. Student.exe
103
asked Nov 12 '18 at 2:59
Mr. Student.exeMr. Student.exe
103
asked Nov 12 '18 at 2:59
Mr. Student.exeMr. Student.exe
103
103
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
0
One approach to this would be to call the setAttribute() or removeAttribute() methods on the button element to toggle the disabled/enabled state of the button depending on the value of the strength variable:
var strength = 0;
document.getElementById("strength").innerHTML = strength;
function updateButtonDisabled()
// If strength less than equal zero disable the button
if(strength <= 0)
document.getElementById("subButton").setAttribute('disabled', 'disabled');
else
document.getElementById("subButton").removeAttribute('disabled');
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>answered Nov 12 '18 at 3:10
Dacre DennyDacre Denny
12.3k41031
Thanks so much! This has been incredibly helpful and solved my problem. Now it's just a matter of rearranging it to have the value in the centre.
– Mr. Student.exe
Nov 12 '18 at 3:45
@Mr.Student.exe you're welcome - just a moment, I'll update the answer to show how that can be done
– Dacre Denny
Nov 12 '18 at 3:45
@Mr.Student.exe does that help?
– Dacre Denny
Nov 12 '18 at 3:46
Oh yeah, it did, only problem I'm facing is converting it to other attributes, like agility. It displays NaN. Any help there?
– Mr. Student.exe
Nov 14 '18 at 0:00
add a comment |
0
You should be able to do:
if (strength === 0)
document.getElementById('subButton').disabled = true;
in subStrength.
Just make sure to set disabled = false if strength > 0 in addStrength!
answered Nov 12 '18 at 3:08
jacob.mccrumbjacob.mccrumb
511216
add a comment |
0
First you need to have a default value for the strength. Here is my working code :
strength = 5;
function subStrength()
if(strength>0)
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
if(strength==0)
document.getElementById("subButton").disabled = true;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
if(strength>0)
document.getElementById("subButton").disabled = false;
<table>
<thead>
<tr>
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>
<th>
<span id="strength"></span>
</th>
</tr>
</thead>
<tbody>
</tbody>
</table>answered Nov 12 '18 at 3:48
Ishmam Haque BhuiyanIshmam Haque Bhuiyan
3010
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
One approach to this would be to call the setAttribute() or removeAttribute() methods on the button element to toggle the disabled/enabled state of the button depending on the value of the strength variable:
var strength = 0;
document.getElementById("strength").innerHTML = strength;
function updateButtonDisabled()
// If strength less than equal zero disable the button
if(strength <= 0)
document.getElementById("subButton").setAttribute('disabled', 'disabled');
else
document.getElementById("subButton").removeAttribute('disabled');
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>answered Nov 12 '18 at 3:10
Dacre DennyDacre Denny
12.3k41031
Thanks so much! This has been incredibly helpful and solved my problem. Now it's just a matter of rearranging it to have the value in the centre.
– Mr. Student.exe
Nov 12 '18 at 3:45
@Mr.Student.exe you're welcome - just a moment, I'll update the answer to show how that can be done
– Dacre Denny
Nov 12 '18 at 3:45
@Mr.Student.exe does that help?
– Dacre Denny
Nov 12 '18 at 3:46
Oh yeah, it did, only problem I'm facing is converting it to other attributes, like agility. It displays NaN. Any help there?
– Mr. Student.exe
Nov 14 '18 at 0:00
add a comment |
0
One approach to this would be to call the setAttribute() or removeAttribute() methods on the button element to toggle the disabled/enabled state of the button depending on the value of the strength variable:
var strength = 0;
document.getElementById("strength").innerHTML = strength;
function updateButtonDisabled()
// If strength less than equal zero disable the button
if(strength <= 0)
document.getElementById("subButton").setAttribute('disabled', 'disabled');
else
document.getElementById("subButton").removeAttribute('disabled');
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>answered Nov 12 '18 at 3:10
Dacre DennyDacre Denny
12.3k41031
Thanks so much! This has been incredibly helpful and solved my problem. Now it's just a matter of rearranging it to have the value in the centre.
– Mr. Student.exe
Nov 12 '18 at 3:45
@Mr.Student.exe you're welcome - just a moment, I'll update the answer to show how that can be done
– Dacre Denny
Nov 12 '18 at 3:45
@Mr.Student.exe does that help?
– Dacre Denny
Nov 12 '18 at 3:46
Oh yeah, it did, only problem I'm facing is converting it to other attributes, like agility. It displays NaN. Any help there?
– Mr. Student.exe
Nov 14 '18 at 0:00
add a comment |
0
0
0
One approach to this would be to call the setAttribute() or removeAttribute() methods on the button element to toggle the disabled/enabled state of the button depending on the value of the strength variable:
var strength = 0;
document.getElementById("strength").innerHTML = strength;
function updateButtonDisabled()
// If strength less than equal zero disable the button
if(strength <= 0)
document.getElementById("subButton").setAttribute('disabled', 'disabled');
else
document.getElementById("subButton").removeAttribute('disabled');
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>answered Nov 12 '18 at 3:10
Dacre DennyDacre Denny
12.3k41031
One approach to this would be to call the setAttribute() or removeAttribute() methods on the button element to toggle the disabled/enabled state of the button depending on the value of the strength variable:
var strength = 0;
document.getElementById("strength").innerHTML = strength;
function updateButtonDisabled()
// If strength less than equal zero disable the button
if(strength <= 0)
document.getElementById("subButton").setAttribute('disabled', 'disabled');
else
document.getElementById("subButton").removeAttribute('disabled');
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>var strength = 0;
document.getElementById("strength").innerHTML = strength;
function updateButtonDisabled()
// If strength less than equal zero disable the button
if(strength <= 0)
document.getElementById("subButton").setAttribute('disabled', 'disabled');
else
document.getElementById("subButton").removeAttribute('disabled');
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>var strength = 0;
document.getElementById("strength").innerHTML = strength;
function updateButtonDisabled()
// If strength less than equal zero disable the button
if(strength <= 0)
document.getElementById("subButton").setAttribute('disabled', 'disabled');
else
document.getElementById("subButton").removeAttribute('disabled');
function subStrength()
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
updateButtonDisabled();
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th>
<span id="strength"></span>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>answered Nov 12 '18 at 3:10
Dacre DennyDacre Denny
12.3k41031
edited Nov 12 '18 at 3:52
answered Nov 12 '18 at 3:10
Dacre DennyDacre Denny
12.3k41031
answered Nov 12 '18 at 3:10
Dacre DennyDacre Denny
12.3k41031
answered Nov 12 '18 at 3:10
Dacre DennyDacre Denny
12.3k41031
12.3k41031
Thanks so much! This has been incredibly helpful and solved my problem. Now it's just a matter of rearranging it to have the value in the centre.
– Mr. Student.exe
Nov 12 '18 at 3:45
@Mr.Student.exe you're welcome - just a moment, I'll update the answer to show how that can be done
– Dacre Denny
Nov 12 '18 at 3:45
@Mr.Student.exe does that help?
– Dacre Denny
Nov 12 '18 at 3:46
Oh yeah, it did, only problem I'm facing is converting it to other attributes, like agility. It displays NaN. Any help there?
– Mr. Student.exe
Nov 14 '18 at 0:00
add a comment |
Thanks so much! This has been incredibly helpful and solved my problem. Now it's just a matter of rearranging it to have the value in the centre.
– Mr. Student.exe
Nov 12 '18 at 3:45
@Mr.Student.exe you're welcome - just a moment, I'll update the answer to show how that can be done
– Dacre Denny
Nov 12 '18 at 3:45
@Mr.Student.exe does that help?
– Dacre Denny
Nov 12 '18 at 3:46
Oh yeah, it did, only problem I'm facing is converting it to other attributes, like agility. It displays NaN. Any help there?
– Mr. Student.exe
Nov 14 '18 at 0:00
Thanks so much! This has been incredibly helpful and solved my problem. Now it's just a matter of rearranging it to have the value in the centre.
– Mr. Student.exe
Nov 12 '18 at 3:45
Thanks so much! This has been incredibly helpful and solved my problem. Now it's just a matter of rearranging it to have the value in the centre.
– Mr. Student.exe
Nov 12 '18 at 3:45
@Mr.Student.exe you're welcome - just a moment, I'll update the answer to show how that can be done
– Dacre Denny
Nov 12 '18 at 3:45
@Mr.Student.exe you're welcome - just a moment, I'll update the answer to show how that can be done
– Dacre Denny
Nov 12 '18 at 3:45
@Mr.Student.exe does that help?
– Dacre Denny
Nov 12 '18 at 3:46
@Mr.Student.exe does that help?
– Dacre Denny
Nov 12 '18 at 3:46
Oh yeah, it did, only problem I'm facing is converting it to other attributes, like agility. It displays NaN. Any help there?
– Mr. Student.exe
Nov 14 '18 at 0:00
Oh yeah, it did, only problem I'm facing is converting it to other attributes, like agility. It displays NaN. Any help there?
– Mr. Student.exe
Nov 14 '18 at 0:00
add a comment |
0
You should be able to do:
if (strength === 0)
document.getElementById('subButton').disabled = true;
in subStrength.
Just make sure to set disabled = false if strength > 0 in addStrength!
answered Nov 12 '18 at 3:08
jacob.mccrumbjacob.mccrumb
511216
add a comment |
0
You should be able to do:
if (strength === 0)
document.getElementById('subButton').disabled = true;
in subStrength.
Just make sure to set disabled = false if strength > 0 in addStrength!
answered Nov 12 '18 at 3:08
jacob.mccrumbjacob.mccrumb
511216
add a comment |
0
0
0
You should be able to do:
if (strength === 0)
document.getElementById('subButton').disabled = true;
in subStrength.
Just make sure to set disabled = false if strength > 0 in addStrength!
answered Nov 12 '18 at 3:08
jacob.mccrumbjacob.mccrumb
511216
You should be able to do:
if (strength === 0)
document.getElementById('subButton').disabled = true;
in subStrength.
Just make sure to set disabled = false if strength > 0 in addStrength!
answered Nov 12 '18 at 3:08
jacob.mccrumbjacob.mccrumb
511216
answered Nov 12 '18 at 3:08
jacob.mccrumbjacob.mccrumb
511216
answered Nov 12 '18 at 3:08
jacob.mccrumbjacob.mccrumb
511216
answered Nov 12 '18 at 3:08
jacob.mccrumbjacob.mccrumb
511216
511216
add a comment |
add a comment |
0
First you need to have a default value for the strength. Here is my working code :
strength = 5;
function subStrength()
if(strength>0)
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
if(strength==0)
document.getElementById("subButton").disabled = true;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
if(strength>0)
document.getElementById("subButton").disabled = false;
<table>
<thead>
<tr>
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>
<th>
<span id="strength"></span>
</th>
</tr>
</thead>
<tbody>
</tbody>
</table>answered Nov 12 '18 at 3:48
Ishmam Haque BhuiyanIshmam Haque Bhuiyan
3010
add a comment |
0
First you need to have a default value for the strength. Here is my working code :
strength = 5;
function subStrength()
if(strength>0)
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
if(strength==0)
document.getElementById("subButton").disabled = true;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
if(strength>0)
document.getElementById("subButton").disabled = false;
<table>
<thead>
<tr>
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>
<th>
<span id="strength"></span>
</th>
</tr>
</thead>
<tbody>
</tbody>
</table>answered Nov 12 '18 at 3:48
Ishmam Haque BhuiyanIshmam Haque Bhuiyan
3010
add a comment |
0
0
0
First you need to have a default value for the strength. Here is my working code :
strength = 5;
function subStrength()
if(strength>0)
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
if(strength==0)
document.getElementById("subButton").disabled = true;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
if(strength>0)
document.getElementById("subButton").disabled = false;
<table>
<thead>
<tr>
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>
<th>
<span id="strength"></span>
</th>
</tr>
</thead>
<tbody>
</tbody>
</table>answered Nov 12 '18 at 3:48
Ishmam Haque BhuiyanIshmam Haque Bhuiyan
3010
First you need to have a default value for the strength. Here is my working code :
strength = 5;
function subStrength()
if(strength>0)
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
if(strength==0)
document.getElementById("subButton").disabled = true;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
if(strength>0)
document.getElementById("subButton").disabled = false;
<table>
<thead>
<tr>
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>
<th>
<span id="strength"></span>
</th>
</tr>
</thead>
<tbody>
</tbody>
</table>strength = 5;
function subStrength()
if(strength>0)
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
if(strength==0)
document.getElementById("subButton").disabled = true;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
if(strength>0)
document.getElementById("subButton").disabled = false;
<table>
<thead>
<tr>
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>
<th>
<span id="strength"></span>
</th>
</tr>
</thead>
<tbody>
</tbody>
</table>strength = 5;
function subStrength()
if(strength>0)
strength = strength - 1;
document.getElementById("strength").innerHTML = strength;
if(strength==0)
document.getElementById("subButton").disabled = true;
function addStrength()
strength = strength + 1;
document.getElementById("strength").innerHTML = strength;
if(strength>0)
document.getElementById("subButton").disabled = false;
<table>
<thead>
<tr>
<th scope="col">
<button class="button" type="button" id="subButton"
onclick="subStrength();" value="subtract">-</button>
</th>
<th scope="col">
<button class="button" type="button"
onclick="addStrength();" value="add">+</button>
</th>
<th>
<span id="strength"></span>
</th>
</tr>
</thead>
<tbody>
</tbody>
</table>answered Nov 12 '18 at 3:48
Ishmam Haque BhuiyanIshmam Haque Bhuiyan
3010
answered Nov 12 '18 at 3:48
Ishmam Haque BhuiyanIshmam Haque Bhuiyan
3010
answered Nov 12 '18 at 3:48
Ishmam Haque BhuiyanIshmam Haque Bhuiyan
3010
answered Nov 12 '18 at 3:48
Ishmam Haque BhuiyanIshmam Haque Bhuiyan
3010
3010
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