[英]I am using ionic and getting an error: SyntaxError: Unexpected token < in JSON at position 0 at JSON.parse (<anonymous>)
[英]I am getting “SyntaxError: Unexpected token ' in JSON at position 1” when using JSON.parse
我在訪問myView.js
上的列表param = ['foo','bar']
時myView.js
。
JS代碼將param
當作字符串對待,但是當我嘗試JSON.parse(param)
,出現如下所示的錯誤。
我在這里想念什么?
<script>
window.obj = {};
obj.param = "{{ param | safe }}";
</script>
def myView(req):
context = {'param':['foo','bar']}
return render(req, 'myView.html', context)
$(document).ready(function() {
console.log(window.obj.param); //prints ['foo','bar']
console.log(window.obj.param[0]); //prints [
console.log(JSON.parse(window.obj.param)); // Uncaught SyntaxError: Unexpected token ' in JSON at position 1
//what I need to happen
console.log(param[0]); // prints 'foo'
});
json格式僅允許使用雙引號( token ' in JSON at position 1
),單引號的字符串不是有效的json格式,因此,如果您嘗試解析它,則會收到錯誤,如此處所示
function safeParse(param){ try { console.log(JSON.parse(param)) } catch (e) { console.log("there was an issue with parsing your string") } } safeParse("['foo','bar']"); safeParse('["foo","bar"]');
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