I have a variable, I created a button that I'll press and change the variable value. How can I perform it?
<html>
<body>
<button>
Button
</button>
<script type="text/javascript">
var a = 0;
</script>
</body>
</html>
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1 Answer
add an onclick handler to the button :
<html>
<body>
<button onclick="setA()">
Button
</button>
<script type="text/javascript">
var a = 0;
function setA(){
a=4;
console.log(a);
}
</script>
</body>
</html>
13 Comments
Silvio Tamaso D'Onofrio
As it, every time but is pressed var a would be re-initialized.
jonathan Heindl
you mean like set to 0 beforehand ? cause I tried with a++ instead and it just keeps increasing oO
Silvio Tamaso D'Onofrio
Yes jonathan. The correct would be set a=0 in a script other than that linked to button, before this one. So you initialize once and everytime but is pressed then proceed with desired calculation.
jonathan Heindl
not sure what you mean but the script tag is only running once only the setA function is called onclick
younyokel
Hey, I want to ask a little question, how do I add a text after pressing the button, for example instead of adding it to console chat?
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