Two good ways to get event source in javascript event function

In the event response of javascript, we need to obtain the event source object to change its properties, such as changing the src attribute of img. There are two ways to obtain event sources in event response functions:

The first type:

Pass it directly as a parameter. For example

Copy the codeThe code is as follows:

 
<div  onclick="show(this);">text</div> 

<script type="text/javascript"> 
function show(obj){ 
(); 
} 
</script> 

The second type:

Use the hidden event object directly. The event object has a srcElement property that can be accessed directly

Copy the codeThe code is as follows:

 
<div  onclick="show();">text</div> 

<script type="text/javascript"> 
function show(){ 
(); 
} 
</script> 