Skip to main content

JSON pretty print using JavaScript

Image
By User



Is there a JavaScript JSON pretty print library (with colors, indentation, etc.)?





Source: Tips4all
Labels:

Comments

  1. Tips For AllApril 9, 2012 at 3:39 AM

    With native JSON, there's no need to use a library, since pretty-printing is implemented natively.

    var obj = {a:1, 'b':'foo', c:[false,null, {d:{e:1.3e5}}]};
    var str = JSON.stringify(obj, undefined, 2); // indentation level = 2


    See the MDN Docs for further details (e.g. on the second argument);

    If you need syntax highlighting, you might use some regex magic like so:

    function syntaxHighlight(json) {
    if (typeof json != 'string') {
    json = JSON.stringify(json, undefined, 2);
    }
    json = json.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
    return json.replace(/("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g, function (match) {
    var cls = 'number';
    if (/^"/.test(match)) {
    if (/:$/.test(match)) {
    cls = 'key';
    } else {
    cls = 'string';
    }
    } else if (/true|false/.test(match)) {
    cls = 'boolean';
    } else if (/null/.test(match)) {
    cls = 'null';
    }
    return '<span class="' + cls + '">' + match + '</span>';
    });
    }


    See in in action (jsfiddle)

    ReplyDelete
  2. Tips For AllApril 9, 2012 at 3:39 AM

    Douglas Crockford's JSON in JavaScript library will pretty print JSON via the stringify method.

    You may also find the answers to this older question useful: How to pretty-print JSON script?

    ReplyDelete
  3. Tips For AllApril 9, 2012 at 3:39 AM

    Pretty Diff uses a heavily modified form of js-beautify. Try it out and see if it does all that you need:

    http://prettydiff.com/

    ReplyDelete

Post a Comment

Popular posts from this blog

Why is this Javascript much *slower* than its jQuery equivalent?

By User
I have a HTML list of about 500 items and a "filter" box above it. I started by using jQuery to filter the list when I typed a letter (timing code added later): $('#filter').keyup( function() { var jqStart = (new Date).getTime(); var search = $(this).val().toLowerCase(); var $list = $('ul.ablist > li'); $list.each( function() { if ( $(this).text().toLowerCase().indexOf(search) === -1 ) $(this).hide(); else $(this).show(); } ); console.log('Time: ' + ((new Date).getTime() - jqStart)); } ); However, there was a couple of seconds delay after typing each letter (particularly the first letter). So I thought it may be slightly quicker if I used plain Javascript (I read recently that jQuery's each function is particularly slow). Here's my JS equivalent: document.getElementById('filter').addEventListener( 'keyup', function () { var jsStart = (new Date).getTime()...
3 comments
Read more

Is it possible to have IF statement in an Echo statement in PHP

By User
Thanks in advance. I did look at the other questions/answers that were similar and didn't find exactly what I was looking for. I'm trying to do this, am I on the right path? echo " <div id='tabs-".$match."'> <textarea id='".$match."' name='".$match."'>". if ($COLUMN_NAME === $match) { echo $FIELD_WITH_COLUMN_NAME; } else { } ."</textarea> <script type='text/javascript'> CKEDITOR.replace( '".$match."' ); </script> </div>"; I am getting the following error message in the browser: Parse error: syntax error, unexpected T_IF Please let me know if this is the right way to go about nesting an IF statement inside an echo. Thank you.
5 comments
Read more