@version    1.3.0
@date       2016-07-08
@stability  3 - Stable

Browser upgrade

Implement EcmaScript 5 methods for older browsers.

Contains

• Function.prototype.bind
• Object.keys
• Object.create
• Array.isArray
• Array.prototype.indexOf
• Array.prototype.lastIndexOf
• Array.prototype.reduce
• Array.prototype.reduceRight
• Array.prototype.forEach
• Array.prototype.every
• Array.prototype.map
• Array.prototype.filter
• Array.prototype.some
• Date.prototype.toJSON
• Date.now
• String.prototype.trim
• JSON
• performance.now
• Object.assign (Use this for optional load)
• fixes FF3 escape second non-standard argument (bug)
• removes background image flickers on hover in IE6
• atob/btoa (base64) // In separate file
• Promise // In separate file

Notes

• If no !DOCTYPE is specified, IE6-9 renders the page in IE5 mode!
• document.createDocumentFragment is unsupported in IE5.5
• IE 5.5 doesn’t support the * collection (all elements) in document.getElementByTagName — it returns a collection with zero members
• instanceof is not implemented in IE5 MAC
• Safari 2.0.2: 416 hasOwnProperty introduced October 31, 2005 (Mac OS X v10.4)

// hasOwnProperty polyfill
Object.prototype.hasOwnProperty = function(name, obj) {
    try {
        obj = this.constructor
        while (obj=obj.prototype) if (obj[name]===this[name]) return false
    } catch(e) {}
    return true
}

External links

• GitHub repo
• npm package
• Standard ECMA-262

Licence

Copyright (c) 2012-2016 Lauri Rooden <lauri@rooden.ee>
The MIT License

Tuesday, March 26, 2013

Have an update or suggestion for this note? You can edit it and send me a pull request.