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Switching styles of JS elements

I need to switch the background image of an element to two images each time I click on it.

I have it, byt he switches the color only two times = \

<html>
<head>
    <title>Javascript Change Div Background Image</title>

    <style type="text/css">

    #div1 {
    width:100px;
    height:30px;
    background-image:url(blue.png);
    }


    </style>

    <script language="javascript" type="text/javascript">
        function changeDivImage() {
            var imgPath = new String();
            imgPath = document.getElementById("div1").style.backgroundImage;

            if (imgPath == "url(blue.png)" || imgPath == "") {
                document.getElementById("div1").style.backgroundImage = "url(green.png)";
            }
            else {
                document.getElementById("div1").style.backgroundImage = "url(blue.png)";
            }
        }
    </script>

</head>

<body>

    <center>
    <p>
        This Javascript Example will change the background image of<br />
        HTML Div Tag onclick event.
    </p>
    <div id="div1">
    </div>
    <br />
    <input type="button" value="Change Background Image" onclick="changeDivImage()" />
    </center>

</body>
</html>
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3 answers

Some browsers most likely give you an absolute path to the image, rather than the relative path that you provide.

Instead ==, check the location of the indexOf()URL.

Example: http://jsfiddle.net/7Rp2G/2/ (click the button several times to see the URL change)

function changeDivImage() {
    var imgPath = new String();
    var div = document.getElementById("div1");
    imgPath = div.style.backgroundImage;

    div.style.backgroundImage = (imgPath.indexOf("blue.png") > -1 || imgPath == "") 
                              ? "url(green.png)" 
                              : "url(blue.png)";

}​

EDIT: Updated to replace if()with a triple.

+3
source

The following code should take care of this.

var current_bg = 'green';

function changeDivImage()
{

    if(current_bg == 'green')
    {

        current_bg = 'blue';

    }
    else
    {

        current_bg = 'green';

    }

    document.getElementById("div1").style.backgroundImage = "url('"+current_bg+".png')";

}
+1

, URL-,

backgroundImage = "url('blue.png')"

, , . , css.

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Source: https://habr.com/ru/post/1766634/

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