jQuery Plugin Check Version

Question

When writing a new jQuery plugin is there a straightforward way of checking that the current version of jQuery is above a certain number? Displaying a warning or logging an

Answer 1

Here is a check I used to make sure the user was using at least v. 1.3.2 of jQuery.

if (/1\.(0|1|2|3)\.(0|1)/.test($.fn.jquery) 
                    || /^1.1/.test($.fn.jquery) 
                    || /^1.2/.test($.fn.jquery)) 
{
    //Tell user they need to upgrade.
}

Answer 2

I'm surprised no one has given this solution yet:

//Returns < 0 if version1 is less than version2; > 0 if version1 is greater than version2, and 0 if they are equal.
var compareVersions = function (version1, version2){

    if(version1 == version2)return 0;

    var version1Parts = version1.split('.');
    var numVersion1Parts = version1Parts.length; 

    var version2Parts = version2.split('.');
    var numVersion2Parts = version2Parts.length; 


    for(var i = 0; i < numVersion1Parts && i < numVersion2Parts; i++){
        var version1Part = parseInt(version1Parts[i], 10);
        var version2Part = parseInt(version2Parts[i], 10);
        if(version1Part > version2Part){
            return 1;
        }
        else if(version1Part < version2Part){
            return -1;
        }
    }

    return numVersion1Parts < numVersion2Parts ? -1 : 1;
}

Answer 3

What about:

function minVersion(version) {
var $vrs = window.jQuery.fn.jquery.split('.'),
min  = version.split('.'),
prevs=[];

for (var i=0, len=$vrs.length; i<len; i++) {
    console.log($vrs[i], min[i], prevs[i-1]);
    if (min[i] && $vrs[i] < min[i]) {
        if (!prevs[i-1] || prevs[i-1] == 0)
            return false;
    } else {
        if ($vrs[i] > min[i])
            prevs[i] = 1;
        else
            prevs[i] = 0;
    }
}
return true;

}

I wrote that code on my forked gist: https://gist.github.com/budiadiono/7954617, original code written by dshaw on: https://gist.github.com/dshaw/652870.

Answer 4

Found this in jquery.1.3.2 source:

 jQuery.fn = jQuery.prototype = {
    init: function( selector, context ) {
    .....
    // The current version of jQuery being used
    jquery: "1.3.2",

I didn't check, but something like "$.fn.jQuery" might work.

Answer 5

Pass version as array of integers, like jQmin([1,4,2]) to check if the current version is equal or above v1.4.2.

function jQmin(min) {
    var i, cur, 
        cver = $.fn.jquery, 
        c = cver.split(".");
    while (min.length < c.length) min.push(0);

    for (i = 0; i < min.length; i++) {
        cur = parseInt(c[i]);
        if (cur > min[i]) return true;
        if (cur < min[i]) return false;
    }
    return (cver === min.join("."));
}

Answer 6

If it's enough to check minor version, not patch version, you can do something like

parseFloat(jQuery.fn.jquery) >= 1.9

It is possible to change this slightly to check >= 1.4.3: parseFloat(jQuery.fn.jquery) > 1.4 || parseFloat(jQuery.fn.jQuery) == 1.4 && parseFloat(jQuery.fn.jQuery.slice(2)) >= 4.3