Calling javascript function when html is executed

Question

I have one task, when I open the html page, that html contains javascript under script tag, and under which I have implemented one function called auther(). How can I call this function while opening the html page, I don't want to implement it by using onClick or onLoad, etc. methods from html/javascript.

Means whenever my html gets executed my javascript function should get called itself. Following is my html:

<html>
   <head>
      <title>Demo</title>
   </head>
<body>
  <div id="authOps" >
      <button onclick="auther();">GET author</button>
      //By clicking on this button it is working but I want to execute 
      //this function when this html get executed
  </div>
</body>
<script type="text/javascript">
   function auther(){
      //some code
   }
</script>
</html>

In the above scenario whenever my html page is opened, the javascript function should get executed without any click handling.

Note : I have mentioned html code just for reference purpose, My main purpose just to execute javascript function, how can I achieve this??

the javascript function should get executed without any click handling, why would a handler run without the event being fired? and also servlet just spits out html, it doesn't do any html processing itself — Ramanlfc
– Ramanlfc, Commented Sep 23, 2017 at 9:39

Gowtham Shiva · Accepted Answer · 2017-09-23 09:51:30Z

There are 2 ways to do this as far as i know,

1:

<html>
   <head>
      <title>Demo</title>
   </head>
<body>
  <div id="authOps" >
      <button onclick="auther();">GET author</button>
      //By clicking on this button it is working but I want to execute 
      //this function when this html get executed
  </div>
</body>
<script type="text/javascript">
   function auther(){
	console.log("Hi");
   };
auther();
</script>
</html>

2:

<html>
   <head>
      <title>Demo</title>
   </head>
<body>
  <div id="authOps" >
      <button >GET author</button>
      //By clicking on this button it is working but I want to execute 
      //this function when this html get executed
  </div>
</body>
<script type="text/javascript">
   var thisIsAFunction = function (){
	console.log("Hi");
   }();
</script>
</html>

You can give a try with both options.

Kennet · Accepted Answer · 2017-09-23 09:26:12Z

0

Just call the method in a script block, instead of from the button click

<script>auther(); </script>

answered Sep 23, 2017 at 9:26

Kennet

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3 Comments

Sonali Khaladkar Over a year ago

I also tried this, but on runtime browser is throwing exception saying undefined method

Sonali Khaladkar Over a year ago

exact error is,"Uncaught ReferenceError: auther is not defined "

Kennet Over a year ago

That's because you called it before it was declared. That's why it's working in @Gowtham Shivas first example

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