Quick code snippets from the jQuery Migrate Plugin. I recommend using the full migrate plugin but if you want specifics for $.live() and $.browser() see below.

var oldLive = jQuery.fn.live;
jQuery.fn.live = function( types, data, fn ) {
    // migrateWarn("jQuery.fn.live() is deprecated");
    if ( oldLive ) {
        return oldLive.apply( this, arguments );
    }
    jQuery( this.context ).on( types, this.selector, data, fn );
    return this;
};

source: https://github.com/jquery/jquery-migrate/blob/master/src/event.js

var browser;


jQuery.uaMatch = function( ua ) {
ua = ua.toLowerCase();

var match = /(chrome)[ /]([w.]+)/.exec( ua ) ||
/(webkit)[ /]([w.]+)/.exec( ua ) ||
/(opera)(?:.*version|)[ /]([w.]+)/.exec( ua ) ||
/(msie) ([w.]+)/.exec( ua ) ||
ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([w.]+)|)/.exec( ua ) ||
[];

return {
browser: match[ 1 ] || "",
version: match[ 2 ] || "0"
};
};


// Don't clobber any existing jQuery.browser in case it's different
if ( !jQuery.browser ) {
matched = jQuery.uaMatch( navigator.userAgent );
browser = {};

if ( matched.browser ) {
browser[ matched.browser ] = true;
browser.version = matched.version;
}

// Chrome is Webkit, but Webkit is also Safari.
if ( browser.chrome ) {
browser.webkit = true;
} else if ( browser.webkit ) {
browser.safari = true;
}

jQuery.browser = browser;
}

source: https://github.com/jquery/jquery-migrate/blob/master/src/core.js

Sam Deering is a Front-end Web Developer who specialises in JavaScript & jQuery. Sam is driven and passionate about sharing his knowledge to educate others.

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  • gmilby

    Haven’t tried these out yet – but they will be incredilby useful if they work well! Thanks!

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