Uncaught TypeError: undefined is not a function in javascript
Question
HTML:
<body>
<div id="main">
<span id="msg">Are you sure you want to proceed?</span><br><br>
<input type=button id="Yes" value="Yes">
<input type=button id="No" value="No">
</div>
</body>
Javascript:
function doTask(){...}
function doNothing(){...}
var do=function(){doTask();}
var nothing=function(){doNothing();}
document.getELementById("Yes").addEventListener("click",do);
document.getELementById("No").addEventListener("click",nothing);
When i run the document, the console shows the Uncaught TypeError: undefined is not a function error on the document.getElementById("Yes")... line. What am i doing wrong?
4 answers
solution1
0 2014-04-22 07:20:32
why not like this ?
document.getElementById("Yes").addEventListener("click",doTask()); document.getElementById("No").addEventListener("click",doNothing());
solution2
0 2014-04-22 07:23:08
Use as
document.getElementById("Yes").addEventListener("click",do,false);
document.getElementById("No").addEventListener("click",nothing,false);
solution3
0 2014-04-22 07:23:15
use getElementById in place of getELementById
document.getElementById("Yes").addEventListener("click",do);
document.getElementById("No").addEventListener("click",nothing);
and you can also use
<input type=button id="Yes" value="Yes" onClick="doTask();">
<input type=button id="No" value="No" onClick="doNothing();">
solution4
0 2014-04-22 07:47:08
Tried by replacing L with l from getELementById() and do with don (just a variable name). Worked fine for me.
function doTask(){alert('Yes');}
function doNothing(){alert('No');}
var don=function(){doTask();};
var nothing=function(){doNothing();};
document.getElementById("Yes").addEventListener("click",don);
document.getElementById("No").addEventListener("click",nothing);
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