onclick event not working in JavaScript

问题

I have some JavaScript code in an HTML page with a button. I have a function called 'click()' that handles the onClick event of the button. The code for the button is as follows:

<input type="button" onClick="click()">button text</input>  

The problem is that when the button is clicked, the function is not called. What am I doing wrong here?
Thanks

回答1:

Two observations:

1. You should write

   <input type="button" value="button text" />
   

   instead of

   <input type="button">button text</input>
   

2. You should rename your function. The function click() is already defined on a button (it simulates a click), and gets a higher priority then your method.

Note that there are a couple of suggestions here that are plain wrong, and you shouldn't spend to much time on them:

• Do not use onclick="javascript:myfunc()". Only use the javascript: prefix inside the href attribute of a hyperlink: <a href="javascript:myfunc()">.
• You don't have to end with a semicolon. onclick="foo()" and onclick="foo();" both work just fine.
• Event attributes in HTML are not case sensitive, so onclick, onClick and ONCLICK all work. It is common practice to write attributes in lowercase: onclick. note that javascript itself is case sensitive, so if you write document.getElementById("...").onclick = ..., then it must be all lowercase.

回答2:

click() is a reserved word and already a function, change the name from click() to runclick() it works fine

回答3:

Try this

<input type="button" onClick="return click();">button text</input>  

回答4:

Check you are calling same function or not.

<script>function greeting(){document.write("hi");}</script>

<input type="button" value="Click Here" onclick="greeting();"/>

回答5:

Try fixing the capitalization. onclick instead of onClick

Reference: Mozilla Developer Docs

回答6:

I suggest you do: <input type="button" value="button text" onclick="click()"> Hope this helps you!

回答7:

<script>
//$(document).ready(function () {
function showcontent() {
        document.getElementById("demo22").innerHTML = "Hello World";
}
//});// end of ready function
</script>

I had the same problem where onclick function calls would not work. I had included the function inside the usual "$(document).ready(function(){});" block used to wrap jquery scripts. Commenting this block out solved the problem.

回答8:

Yes you should change the name of your function. Javascript has reserved methods and onclick = >>>> click() <<<< is one of them so just rename it, add an 's' to the end of it or something. strong text`

回答9:

Today this also happened to me. The function name maybe conflicts with keywords. My case is scrape(). I change the function name, everything works fine.

来源：https://stackoverflow.com/questions/5453937/onclick-event-not-working-in-javascript