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Discussion on jQuery's data api issue when the custom data attribute is a json format string_javascript skills
Discussion on jQuery's data api issue when the custom data attribute is a json format string_javascript skills
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Release: 2016-05-16 17:41:53
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jQuery's data API implementation has the effect of caching data Using IE 7 (IE8 switches to IE7 mode in the console), when the DOM node has custom data attributes, you can check the DOM node to see attributes in the shape of jQuery18305664906559272507 , which is the construction used to get custom data from the data storage object.
When the custom data attribute is a json format string, if the cached data is modified, the modified data will continue to exist in the cache system. If you are not careful, this may cause some BUG
< ;script> var node = $("#tst"); console.log(node.attr("data-json")); var data = node.data("json") ; console.log(data); data.b = 'hello'; var data1 = JSON.parse(node.attr("data-json")); console.log (data1); console.log('data===data1',data===data1); var data2 = node.data("json"); console.log(data2) ; console.log('data===data2',data===data2); var data3 = JSON.parse(node.attr("data-json"));//Get the value like this Not affected by caching console.log(data3);
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