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Check if mousedown with an if statement?

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悲哀的现实
悲哀的现实 2021-02-02 17:16

Is it possible to do something like this:

if ($(this).mousedown() == true) {

I thought that would work but it doesn\'t.

Additio

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5条回答
  • 没有蜡笔的小新
    2021-02-02 17:34

    The easiest way I can think of is to bind mousedown and mouseup event listeners to the document and update a global variable accordingly. In the mouseout event of your element you can check the state of that variable and act as appropriate. (Note: this assumes that you don't care whether or not the mouse was pressed down while over the div or not... you'll have to clarify your question around that).

    var down = false;
$(document).mousedown(function() {
    down = true;
}).mouseup(function() {
    down = false;  
});
$("#example").mouseout(function() {
    if(down) {
        console.log("down");  
    } 
    else {
        console.log("up");   
    }
});

    Here's a working example of the above.

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  • 后悔当初
    2021-02-02 17:50

    Answering your original question, yes this is possible. When the mousedown event fires over an element the element becomes active and is selectable by the pseudo selector :active. In jQuery if nothing is selected an empty array is returned, we can use this to our advantage in combination with the .length array property and turn the active pseudo selector into a check to see if the mouse is down over a particular element or not like so:

    if ( $('#id:active').length ) {
  //do something
}

    Checking if the mouse was down over a particular element at a given point in time is a different event and does not go with the title of this question and should be changed might I add. Google brought me here and this answer is for those that will inevitably follow.

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  • 孤街浪徒
    2021-02-02 17:52

    Alright, well the best option I can give you is this: http://jsfiddle.net/qK8rr/2/

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  • 感情败类
    2021-02-02 17:55

    Check out this one. http://jsfiddle.net/b1Lzo60n/

    Mousedown starts a timer that checks if mouse is still down after 1 second.

    <button id="button">Press me</button>
<div id="log"></div>

    Code:

    var mousedown = false;
var mousedown_timer = '';
$('#button').mousedown(function(e) {
    mousedown = true;
    $('#log').text('mousedown...');
    mousedown_timer = setTimeout(function () {
        if(mousedown) {
            $('#log').text('1 second');
        }
    }, 1000);
}).mouseup(function(e) {
    mousedown = false;
    clearTimeout(mousedown_timer);
    $('#log').text('aborted');
});
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  • 礼貌的吻别
    2021-02-02 17:56

    http://jsfiddle.net/5HrWF/

    something like this?

    Code:

    <!DOCTYPE html>
<html>
<head>
  <script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
  <p>Press mouse and release here.</p>

<script>
    $("p").mouseup(function(){
      $(this).append('<span style="color:#F00;">Mouse up.</span>');
    }).mousedown(function(){
      $(this).append('<span style="color:#00F;">Mouse down.</span>');
    });

</script>

</body>
</html>
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