How to pass the button value into my onclick event function?

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 5  2032

test

The dosomething function evoked when to click the button,how can pa

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5条回答

有刺的猬

2020-12-24 13:47
You can pass the value to the function using this.value, where this points to the button
```
<input type="button" value="mybutton1" onclick="dosomething(this.value)">
```
And then access that value in the function
```
function dosomething(val){
  console.log(val);
}
```
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终归单人心

2020-12-24 13:54
You can pass the element into the function <input type="button" value="mybutton1" onclick="dosomething(this)">test by passing this. Then in the function you can access the value like this:
```
function dosomething(element) {
  console.log(element.value);
}
```
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我寻月下人不归

2020-12-24 13:55

You can do like this.

<input type="button" value="mybutton1" onclick="dosomething(this)">

function dosomething(element){
    alert("value is "+element.value); //you can print any value like id,class,value,innerHTML etc.
};

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孤城傲影

2020-12-24 13:59

Maybe you can take a look at closure in JavaScript. Here is a working solution:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>Test</title>
    </head>
    <body>
        <p class="button">Button 0</p>
        <p class="button">Button 1</p>
        <p class="button">Button 2</p>
        <script>
            var buttons = document.getElementsByClassName('button');
            for (var i=0 ; i < buttons.length ; i++){
              (function(index){
                buttons[index].onclick = function(){
                  alert("I am button " + index);
                };
              })(i)
            }
        </script>
    </body>
</html>

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醉话见心

2020-12-24 14:06
You can get value by using id for that element in onclick function
```
function dosomething(){
     var buttonValue = document.getElementById('buttonId').value;
}
```
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