使用js删除localstorage中的json对象

Question

[{'id':1,'content':'something'},{'id':2,'content':'something diff'},{'id':3,'content':'something diff'}]

by localStorage.getItem('data')我得到了上面的json对象，但是如何删除id 2项呢？

Answer 1

假设您已将本地存储数据 JSON.parse 到一个数组中，您可以像从任何其他数组中删除第二项一样，通过弹出它。

var data = localStorage.getItem('data');
// At this point, data is either null or a string value.
// To restore the string to an Array you need to use JSON.parse
if (data) {
  data = JSON.parse(data);

  // At this point you can use Array methods like pop or splice to remove objects.
}
// At this point, your Array will only contain the first item.
// If you want to write it back to local storage, you can like so:
// Be sure to use JSON.stringify so it can later be restored with parse.
localStorage.setItem('data', JSON.stringify(data));

Answer 2

这会将“数据”转换为 javascript 对象并删除最后一项（假设这始终是一个数组）：

var data = localStorage.getItem('data');
if (data) {
   data = JSON.parse(data);
   data.pop();
}