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                            ## trigger
讓一個元素事件在另一個元素中調用.
```
<body>
<input type="button" value="綁定" id="btn1">
<input type="button" value="解綁" id="btn2">
<div id="box"></div>
<script>
    $(function () {
        $('#btn1').click(function () {
            $(this).css('backgroundColor', 'red');
        });

        $('#btn2').click(function () {
            //第一種方式
            $('#btn1').click();
            //第二種
            $('#btn1').trigger('click');
            //第三種
            $('#btn1').triggerHandler('click');
        })
    })
</script>
```

## 觸發事件默認行為
```
<body>
<input type="button" value="觸發" id="btn">
<input type="text" id="txt">
<span id="sp"></span>
<div id="box"></div>
<script>
    $(function () {
        $('#btn').click(function () {
            // $('#txt').trigger('focus');            //前兩種是相同的
            // $('#txt').focus();
            $('#txt').triggerHandler('focus');        //此方法不會觸發瀏覽器默認事件(文本框閃爍)
            $('#sp').text('文本獲取焦點');
        })
    })
</script>
```


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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