标记在IE8以下时使用JSON.stringify报JSON未定义错误的问题

调用的页面里引用json2.js即可解决问题(推荐方法)。

即:<script type="text/JavaScript" src="js/json2.js"></script>

json2.js如下：

// json2.js
	// 2017-06-12
	// Public Domain.
	// NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
	// USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
	// NOT CONTROL.
	// This file creates a global JSON object containing two methods: stringify
	// and parse. This file provides the ES5 JSON capability to ES3 systems.
	// If a project might run on IE8 or earlier, then this file should be included.
	// This file does nothing on ES5 systems.
	// JSON.stringify(value, replacer, space)
	// value any JavaScript value, usually an object or array.
	// replacer an optional parameter that determines how object
	// values are stringified for objects. It can be a
	// function or an array of strings.
	// space an optional parameter that specifies the indentation
	// of nested structures. If it is omitted, the text will
	// be packed without extra whitespace. If it is a number,
	// it will specify the number of spaces to indent at each
	// it contains the characters used to indent at each level.
	// This method produces a JSON text from a JavaScript value.
	// When an object value is found, if the object contains a toJSON
	// method, its toJSON method will be called and the result will be
	// stringified. A toJSON method does not serialize: it returns the
	// value represented by the name/value pair that should be serialized,
	// or undefined if nothing should be serialized. The toJSON method
	// will be passed the key associated with the value, and this will be
	// bound to the value.
	// For example, this would serialize Dates as ISO strings.
	// Date.prototype.toJSON = function (key) {
	// function f(n) {
	// // Format integers to have at least two digits.
	// return (n < 10)
	// : n;
	// }
	// };
	// You can provide an optional replacer method. It will be passed the
	// key and value of each member, with this bound to the containing
	// object. The value that is returned from your method will be
	// serialized. If your method returns undefined, then the member will
	// be excluded from the serialization.
	// If the replacer parameter is an array of strings, then it will be
	// used to select the members to be serialized. It filters the results
	// such that only members with keys listed in the replacer array are
	// stringified.
	// Values that do not have JSON representations, such as undefined or
	// functions, will not be serialized. Such values in objects will be
	// dropped; in arrays they will be replaced with null. You can use
	// a replacer function to replace those with JSON values.
	// JSON.stringify(undefined) returns undefined.
	// The optional space parameter produces a stringification of the
	// value that is filled with line breaks and indentation to make it
	// easier to read.
	// If the space parameter is a non-empty string, then that string will
	// be used for indentation. If the space parameter is a number, then
	// the indentation will be that many spaces.
	// Example:
	// text = JSON.stringify([new Date()], function (key, value) {
	// return this[key] instanceof Date
	// : value;
	// });
	// JSON.parse(text, reviver)
	// This method parses a JSON text to produce an object or array.
	// It can throw a SyntaxError exception.
	// The optional reviver parameter is a function that can filter and
	// transform the results. It receives each of the keys and values,
	// and its return value is used instead of the original value.
	// If it returns what it received, then the structure is not modified.
	// If it returns undefined then the member is deleted.
	// Example:
	// // Parse the text. Values that look like ISO date strings will
	// // be converted to Date objects.
	// myData = JSON.parse(text, function (key, value) {
	// var a;
	// a =
	// /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
	// if (a) {
	// return new Date(Date.UTC(
	// +a[1], +a[2] - 1, +a[3], +a[4], +a[5], +a[6]
	// ));
	// }
	// return value;
	// }
	// });
	// myData = JSON.parse(
	// function (key, value) {
	// var d;
	// if (
	// ) {
	// d = new Date(value.slice(5, -1));
	// if (d) {
	// return d;
	// }
	// }
	// return value;
	// }
	// );
	// This is a reference implementation. You are free to copy, modify, or
	// redistribute.
	/*jslint
	eval, for, this
	*/
	/*property
	JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
	getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
	lastIndex, length, parse, prototype, push, replace, slice, stringify,
	test, toJSON, toString, valueOf
	*/
	// Create a JSON object only if one does not already exist. We create the
	// methods in a closure to avoid creating global variables.
	= {};
	}
	function () {
	/;
	/g;
	/g;
	/g;
	/g;
	/g;
	n) {
	// Format integers to have at least two digits.
	10)
	+ n
	: n;
	}
	this_value() {
	valueOf();
	}
	function () {
	valueOf())
	? (
	getUTCFullYear()
	1)
	getUTCDate())
	getUTCHours())
	getUTCMinutes())
	getUTCSeconds())
	)
	null;
	};
	= this_value;
	= this_value;
	= this_value;
	}
	var gap;
	var indent;
	var meta;
	var rep;
	string) {
	// If the string contains no control characters, no quote characters, and no
	// backslash characters, then we can safely slap some quotes around it.
	// Otherwise we must also replace the offending characters with safe escape
	// sequences.
	0;
	test(string)
	a) {
	= meta[a];
	? c
	4);
	}
	holder) {
	// Produce a string from holder[key].
	// The loop counter.
	// The member key.
	// The member value.
	var length;
	= gap;
	var partial;
	= holder[key];
	// If the value has a toJSON method, call it to obtain a replacement value.
	if (
	value
	) {
	toJSON(key);
	}
	// If we were called with a replacer function, then call the replacer to
	// obtain a replacement value.
	call(holder, key, value);
	}
	// What happens next depends on the value's type.
	typeof value) {
	quote(value);
	// JSON numbers must be finite. Encode non-finite numbers as null.
	isFinite(value))
	String(value)
	// If the value is a boolean or null, convert it to a string. Note:
	// the remote chance that this gets fixed someday.
	String(value);
	// null.
	// so watch out for that case.
	!value) {
	}
	// Make an array to hold the partial results of stringifying this object value.
	+= indent;
	= [];
	// Is the value an array?
	// The value is an array. Stringify every element. Use null as a placeholder
	// for non-JSON values.
	length;
	1) {
	}
	// Join all of the elements together, separated with commas, and wrap them in
	// brackets.
	0
	: gap
	? (
	+ gap
	+ gap)
	+ mind
	)
	= mind;
	return v;
	}
	// If the replacer is an array, use it to select the members to be stringified.
	length;
	1) {
	= rep[i];
	str(k, value);
	if (v) {
	+ (
	(gap)
	+ v);
	}
	}
	}
	else {
	// Otherwise, iterate through all of the keys in the object.
	in value) {
	call(value, k)) {
	str(k, value);
	if (v) {
	+ (
	(gap)
	+ v);
	}
	}
	}
	}
	// Join all of the member texts together, separated with commas,
	// and wrap them in braces.
	0
	: gap
	= mind;
	return v;
	}
	}
	// If the JSON object does not yet have a stringify method, give it one.
	// table of character substitutions
	};
	space) {
	// The stringify method takes a value and an optional replacer, and an optional
	// space parameter, and returns a JSON text. The replacer can be a function
	// that can replace values, or an array of strings that will select the keys.
	// A default replacer method can be provided. Use of the space parameter can
	// produce text that is more easily readable.
	var i;
	// If the space parameter is a number, make an indent string containing that
	// many spaces.
	1) {
	}
	// If the space parameter is a string, it will be used as the indent string.
	= space;
	}
	// If there is a replacer, it must be a function or an array.
	// Otherwise, throw an error.
	= replacer;
	&& (
	)) {
	}
	// Return the result of stringifying the value.
	: value});
	};
	}
	// If the JSON object does not yet have a parse method, give it one.
	reviver) {
	// The parse method takes a text and an optional reviver function, and returns
	// a JavaScript value if the text is a valid JSON text.
	var j;
	key) {
	// The walk method is used to recursively walk the resulting structure so
	// that modifications can be made.
	var k;
	var v;
	= holder[key];
	in value) {
	call(value, k)) {
	walk(value, k);
	undefined) {
	= v;
	else {
	delete value[k];
	}
	}
	}
	}
	call(holder, key, value);
	}
	// Parsing happens in four stages. In the first stage, we replace certain
	// Unicode characters with escape sequences. JavaScript handles many characters
	// incorrectly, either silently deleting them, or treating them as line endings.
	String(text);
	0;
	test(text)) {
	a) {
	return (
	4)
	);
	});
	}
	// In the second stage, we run the text against regular expressions that look
	// But just to be safe, we want to reject all unexpected forms.
	// We split the second stage into 4 regexp operations in order to work around
	// crippling inefficiencies in IE's and Safari's regexp engines. First we
	// open brackets that follow a colon or comma or that begin the text. Finally,
	if (
	test(
	text
	)
	) {
	// In the third stage we use the eval function to compile the text into a
	// in JavaScript: it can begin a block or an object literal. We wrap the text
	// in parens to eliminate the ambiguity.
	// In the optional fourth stage, we recursively walk the new structure, passing
	// each name/value pair to a reviver function for possible transformation.
	: j;
	}
	// If the text is not JSON parseable, then a SyntaxError is thrown.
	};
	}
	}());