How to set JSON format to HTML5 data attributes in the jQuery
I'm trying these HTML
<div data-params="{a:开发者_如何学Python 1, b: '2'}" id="TEST1"></div>
<div data-params='{"a": 1, "b": "2"}' id="TEST2"></div>
Then I use data() method in the jQuery
$('#TEST1').data('params'); //return a string
$('#TEST2').data('params'); //return a object
But TEST1 it's not a return object, but a string, it can only return object TEST2. But I want to get a object by TEST1, How do I do it?
=============
Finally, I choose to write a function to achieve their own needs
$.fn.data2 = function(key, value)
{
if (value === undefined)
{
var data = $(this).data(key);
if (typeof(data) === 'string')
{
var _data = data.replace(/^[\s\r\n]*/g, '').replace(/[\s\r\n]*$/g, '');
if (_data.match(/\{.*\}/) || _data.match(/\[.*\]/)) {
try {
_data = (new Function( 'return ' + data ))();
if (typeof(_data) == 'object') {
$(this).data(key, _data);
data = _data;
}
} catch(ex) {}
}
}
return data;
}
return $(this).data(key, value);
};
In order to be parsed as an object, the data attribute must be a well formed JSON object.
In your case you just need to quote the object keys (as you do in the second object). Try:
<div data-params='{"a": 1, "b": "2"}' id="TEST1"></div>
For more info see the data method docs, the relevant part is this one (emphasis mine):
Every attempt is made to convert the string to a JavaScript value (this includes booleans, numbers, objects, arrays, and null) otherwise it is left as a string... ...When the data attribute is an object (starts with
'{') or array (starts with'[') thenjQuery.parseJSONis used to parse the string; it must follow valid JSON syntax including quoted property names.
You can escape the inner quotes:
<div data-params="{"a": 1, "b": "2"}" id="TEST2"></div>
But there is nothing wrong with your second method:
<div data-params='{"a": 1, "b": "2"}' id="TEST2"></div>
I would use that.
Try this one. It's how Uikit parse data attribute json. Hope this will helpful
function str2json(str, notevil) {
try {
if (notevil) {
return JSON.parse(str
.replace(/([\$\w]+)\s*:/g, function(_, $1){return '"'+$1+'":';})
.replace(/'([^']+)'/g, function(_, $1){return '"'+$1+'"';})
);
} else {
return (new Function("", "var json = " + str + "; return JSON.parse(JSON.stringify(json));"))();
}
} catch(e) { return false; }
}
function options(string) {
if (typeof string !='string') return string;
if (string.indexOf(':') != -1 && string.trim().substr(-1) != '}') {
string = '{'+string+'}';
}
var start = (string ? string.indexOf("{") : -1), options = {};
if (start != -1) {
try {
options = str2json(string.substr(start));
} catch (e) {}
}
return options;
}
var paramsData = document.querySelectorAll('[data-params]')[0].dataset.params;
var optionsParsed = options(paramsData);
console.log(optionsParsed);<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
</head>
<body>
<div data-params="{hello: 'world'}"></div>
</body>
</html>
加载中,请稍侯......
精彩评论