Parse string with javascript

Question

I have an element on the form:

<img src="/media/BodyPart_7d0cf57e-a461-44fd-903f-ce77b005e299/300/0" class="media-item">

I want to extract the Bodypart_xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

Here ix the mask of the string "/{anyt-ext-here}/BodyPart_xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/{any-number-here}/{any-number-here}"

What is the best day of doint it?

Probably string.match(/bodypart_[^\/]+/i) will do. If no match is found, it returns null, otherwise an array of the first match. — RobG
– RobG, Commented Apr 2, 2015 at 2:55

Gaël Barbin · Accepted Answer · 2015-04-02 02:59:22Z

1

Something like that:

var output= document.querySelector("#output");
var img= document.querySelector(".media-item"); //assuming there is only the wanted img of this class

var extracted_string= img.src.match(/BodyPart[^\/]*/);
if( extracted_string )
  output.innerHTML= extracted_string;
else
  output.innerHTML= "no match found";

<img src="/media/BodyPart_7d0cf57e-a461-44fd-903f-ce77b005e299/300/0" class="media-item">

<div id="output"></div>

answered Apr 2, 2015 at 2:59

Gaël Barbin

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3 Comments

Sergino Over a year ago

getting error here: img.src.match(/BodyPart[^\/]*/) saying img.src underfined. I cehcked on debugger img has outerHTML outerHTML: "<img src="/media/BodyPart_......." I actually used jquery $(this).prev("img.media-item"); insteard of document.querySelector probably that is the reason why src in uderfined

Sergino Over a year ago

was trying $(img)attr("src") - not avaliable

Gaël Barbin Over a year ago

jquery returns an array of all element matching the selector, even if there is only one returned. So you can use: $(this).prev("img.media-item")[0] to get the img element, then you will be able to get the src attribute with: $(this).prev("img.media-item")[0].src, and $(this).prev("img.media-item")[0].src.match(/BodyPart[^\/]*/) to get the URL part requested.

guest271314 · Accepted Answer · 2015-04-02 03:23:00Z

1

Try utilizing .split() , .filter()

var img = document.querySelectorAll("img[src*=BodyPart]")[0];
var res = img.src.split("/").filter(function(src, i) {
            return /BodyPart/.test(src)
          })[0];
console.log(res);

<img src="/media/BodyPart_7d0cf57e-a461-44fd-903f-ce77b005e299/300/0" class="media-item">

answered Apr 2, 2015 at 3:23

guest271314

1

Comments

Tim Biegeleisen · Accepted Answer · 2015-04-02 04:11:52Z

1

Try this code:

var input   = "<img src=\"/media/BodyPart_7d0cf57e-a461-44fd-903f-ce77b005e299/300/0\" class=\"media-item\">";
var matches = input.match(/^<img src=.*\/(BodyPart\_\w{8}\-\w{4}\-\w{4}\-\w{4}\-\w{12})\//);

alert(matches[1]);

Output:

BodyPart_7d0cf57e-a461-44fd-903f-ce77b005e299

edited Apr 2, 2015 at 4:11

answered Apr 2, 2015 at 3:03

Tim Biegeleisen

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