jQuery 1.x 向下兼容插件（最好用的兼容插件，没有之一）

/*! * jQuery Migrate - v1.4.1 - 2016-05-19 * Copyright jQuery Foundation and other contributors */ (function( jQuery, window, undefined ) { // See http://bugs.jquery.com/ticket/13335 // "use strict"; jQuery.migrateVersion = "1.4.1"; var warnedAbout = {}; // List of warnings already given; public read only jQuery.migrateWarnings = []; // Set to true to prevent console output; migrateWarnings still maintained // jQuery.migrateMute = false; // Show a message on the console so devs know we're active if ( window.console && window.console.log ) { window.console.log( "JQMIGRATE: Migrate is installed" + ( jQuery.migrateMute ? "" : " with logging active" ) + ", version " + jQuery.migrateVersion ); } // Set to false to disable traces that appear with warnings if ( jQuery.migrateTrace === undefined ) { jQuery.migrateTrace = true; } // Forget any warnings we've already given; public jQuery.migrateReset = function() { warnedAbout = {}; jQuery.migrateWarnings.length = 0; }; function migrateWarn( msg) { var console = window.console; if ( !warnedAbout[ msg ] ) { warnedAbout[ msg ] = true; jQuery.migrateWarnings.push( msg ); if ( console && console.warn && !jQuery.migrateMute ) { console.warn( "JQMIGRATE: " + msg ); if ( jQuery.migrateTrace && console.trace ) { console.trace(); } } } } function migrateWarnProp( obj, prop, value, msg ) { if ( Object.defineProperty ) { // On ES5 browsers (non-oldIE), warn if the code tries to get prop; // allow property to be overwritten in case some other plugin wants it try { Object.defineProperty( obj, prop, { configurable: true, enumerable: true, get: function() { migrateWarn( msg ); return value; }, set: function( newValue ) { migrateWarn( msg ); value = newValue; } }); return; } catch( err ) { // IE8 is a dope about Object.defineProperty, can't warn there } } // Non-ES5 (or broken) browser; just set the property jQuery._definePropertyBroken = true; obj[ prop ] = value; } if ( document.compatMode === "BackCompat" ) { // jQuery has never supported or tested Quirks Mode migrateWarn( "jQuery is not compatible with Quirks Mode" ); } var attrFn = jQuery( "<input/>", { size: 1 } ).attr("size") && jQuery.attrFn, oldAttr = jQuery.attr, valueAttrGet = jQuery.attrHooks.value && jQuery.attrHooks.value.get || function() { return null; }, valueAttrSet = jQuery.attrHooks.value && jQuery.attrHooks.value.set || function() { return undefined; }, rnoType = /^(?:input|button)$/i, rnoAttrNodeType = /^[238]$/, rboolean = /^(?:autofocus|autoplay|async|checked|controls|defer|disabled|hidden|loop|multiple|open|readonly|required|scoped|selected)$/i, ruseDefault = /^(?:checked|selected)$/i; // jQuery.attrFn migrateWarnProp( jQuery, "attrFn", attrFn || {}, "jQuery.attrFn is deprecated" ); jQuery.attr = function( elem, name, value, pass ) { var lowerName = name.toLowerCase(), nType = elem && elem.nodeType; if ( pass ) { // Since pass is used internally, we only warn for new jQuery // versions where there isn't a pass arg in the formal params if ( oldAttr.length < 4 ) { migrateWarn("jQuery.fn.attr( props, pass ) is deprecated"); } if ( elem && !rnoAttrNodeType.test( nType ) && (attrFn ? name in attrFn : jQuery.isFunction(jQuery.fn[name])) ) { return jQuery( elem )[ name ]( value ); } } // Warn if user tries to set `type`, since it breaks on IE 6/7/8; by checking // for disconnected elements we don't warn on $( "<button>", { type: "button" } ). if ( name === "type" && value !== undefined && rnoType.test( elem.nodeName ) && elem.parentNode ) { migrateWarn("Can't change the 'type' of an input or button in IE 6/7/8"); } // Restore boolHook for boolean property/attribute synchronization if ( !jQuery.attrHooks[ lowerName ] && rboolean.test( lowerName ) ) { jQuery.attrHooks[ lowerName ] = { get: function( elem, name ) { // Align boolean attributes with corresponding properties // Fall back to attribute presence where some booleans are not supported var attrNode, property = jQuery.prop( elem, name ); return property === true || typeof property !== "boolean" && ( attrNode = elem.getAttributeNode(name) ) && attrNode.nodeValue !== false ? name.toLowerCase() : undefined; }, set: function( elem, value, name ) { var propName; if ( value === false ) { // Remove boolean attributes when set to false jQuery.removeAttr( elem, name ); } else { // value is true since we know at this point it's type boolean and not false // Set boolean attributes to the same name and set the DOM property propName = jQuery.propFix[ name ] || name; if ( propName in elem ) { // Only set the IDL specifically if it already exists on the element elem[ propName ] = true; } elem.setAttribute( name, name.toLowerCase() ); } return name; } }; // Warn only for attributes that can remain distinct from their properties post-1.9 if ( ruseDefault.test( lowerName ) ) { migrateWarn( "jQuery.fn.attr('" + lowerName + "') might use property instead of attribute" ); } } return oldAttr.call( jQuery, elem, name, value ); }; // attrHooks: value jQuery.attrHooks.value = { get: function( elem, name ) { var nodeName = ( elem.nodeName || "" ).toLowerCase(); if ( nodeName === "button" ) { return valueAttrGet.apply( this, arguments ); } if ( nodeName !== "input" && nodeName !== "option" ) { migrateWarn("jQuery.fn.attr('value') no longer gets properties"); } return name in elem ? elem.value : null; }, set: function( elem, value ) { var nodeName = ( elem.nodeName || "" ).toLowerCase(); if ( nodeName === "button" ) { return valueAttrSet.apply( this, arguments ); } if ( nodeName !== "input" && nodeName !== "option" ) { migrateWarn("jQuery.fn.attr('value', val) no longer sets properties"); } // Does not return so that setAttribute is also used elem.value = value; } }; var matched, browser, oldInit = jQuery.fn.init, oldFind = jQuery.find, oldParseJSON = jQuery.parseJSON, rspaceAngle = /^\s*</, rattrHashTest = /\[(\s*[-\w]+\s*)([~|^$*]?=)\s*([-\w#]*?#[-\w#]*)\s*\]/, rattrHashGlob = /\[(\s*[-\w]+\s*)([~|^$*]?=)\s*([-\w#]*?#[-\w#]*)\s*\]/g, // Note: XSS check is done below after string is trimmed rquickExpr = /^([^<]*)(<[\w\W]+>)([^>]*)$/; // $(html) "looks like html" rule change jQuery.fn.init = function( selector, context, rootjQuery ) { var match, ret; if ( selector && typeof selector === "string" ) { if ( !jQuery.isPlainObject( context ) && (match = rquickExpr.exec( jQuery.trim( selector ) )) && match[ 0 ] ) { // This is an HTML string according to the "old" rules; is it still? if ( !rspaceAngle.test( selector ) ) { migrateWarn("$(html) HTML strings must start with '<' character"); } if ( match[ 3 ] ) { migrateWarn("$(html) HTML text after last tag is ignored"); } // Consistently reject any HTML-like string starting with a hash (gh-9521) // Note that this may break jQuery 1.6.x code that otherwise would work. if ( match[ 0 ].charAt( 0 ) === "#" ) { migrateWarn("HTML string cannot start with a '#' character"); jQuery.error("JQMIGRATE: Invalid selector string (XSS)"); } // Now process using loose rules; let pre-1.8 play too // Is this a jQuery context? parseHTML expects a DOM element (#178) if ( context && context.context && context.context.nodeType ) { context = context.context; } if ( jQuery.parseHTML ) { return oldInit.call( this, jQuery.parseHTML( match[ 2 ], context && context.ownerDocument || context || document, true ), context, rootjQuery ); } } } ret = oldInit.apply( this, arguments ); // Fill in selector and context properties so .live() works if ( selector && selector.selector !== undefined ) { // A jQuery object, copy its properties ret.selector = sele