使用jQuery / JavaScript替换一部分字符串

Question

I have a variable as below

var a = "Hi this is test. <img src='http://www.test.com/img1.jpg'> Test ends here";

I want to replace the src of image tag to some other image url lets say http://www.test2.com/img2.jpg

So the output should be

var b = "Hi this is test. <img src='http://www.test2.com/img2.jpg'> Test ends here";

Both the image path would be dynamic.

Please help.

Answer 1

You can set the url of the image by making it a jquery object, like so:

var $myImg = $("<img src='http://www.test.com/img1.jpg'>");
$myImg.attr("src","http://www.test2.com/img2.jpg");

Answer 2

See this example: http://jsfiddle.net/pnwKs/

Depending on how you want to change the url, you can use the attr command.

// changes the full SRC path
$('#1').attr('src', 'http://placehold.it/350x250');


// replaces some part of the SRC path
$('#2').attr('src', $('#1').attr('src').replace('250','400'));

If it's inside a string you could do:

var a = "Hi this is test. <img src='http://www.test.com/img1.jpg'> Test ends here";
a.replace('img1.jpg', 'img2.jpg');

Answer 3

看一下示例： http : //jsfiddle.net/ricardolohmann/Ww2Lu/您可以更改src，而只需将新的src传递给参数即可。