当自定义数据属性为json格式字符串时jQuery的data api问题探讨_javascript技巧

<script> <BR>var node = $("#tst"); <BR>console.log(node.attr("data-json")); <BR>var data = node.data("json"); <BR>console.log(data); <BR>data.b = 'hello'; <BR>var data1 = JSON.parse(node.attr("data-json")); <BR>console.log(data1); <BR>console.log('data===data1',data===data1); <BR>var data2 = node.data("json"); <BR>console.log(data2); <BR>console.log('data===data2',data===data2); <BR>var data3 = JSON.parse(node.attr("data-json"));//这样取值不受缓存影响 <BR>console.log(data3); <BR></script>

{"a":123,"b":456}
Object {a: 123, b: 456}
Object {a: 123, b: 456}
data===data1 false
Object {a: 123, b: "hello"}
data===data2 true
Object {a: 123, b: 456}