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// vanillaJS function isJSON(str) { try { return (JSON.parse(str) && !!str); } catch (e) { return false; } } Usage: isJSON({}) will be false, isJSON('{}') will be true. To check if something is an Array or Object (parsed JSON):
12 maj 2015 · The reasons why you can't parse Json from a String: the String is surround by " ". and use \" escape inside. Here is an example: " {\"name\":\"alan\",\"age\":34}" when you try to parse above string by JSON.parse (), still return the a string: {"name":"alan","age":34}, and \" is replace by ".
22 paź 2017 · try { let sData = ` { "id": "1", "name": "UbuntuGod", } `; console.log(JSON.parse(sData)); } catch (objError) { if (objError instanceof SyntaxError) { console.error(objError.name); } else { console.error(objError.message); } }
16 lis 2022 · How frustrating is it if you want to load a JSON document, and you get a vague error like: SyntaxError: JSON.parse: unexpected character at line 2 column 18 of the JSON data. How can you figure out what is wrong, without spending too much time on it? And, of course, how to solve the problem and fix JSON?
12 cze 2024 · JSON.parse() parses a JSON string according to the JSON grammar, then evaluates the string as if it's a JavaScript expression.
24 lip 2023 · The JavaScript exceptions thrown by JSON.parse() occur when string failed to be parsed as JSON.
Use the JavaScript function JSON.parse() to convert text into a JavaScript object: const obj = JSON.parse('{"name":"John", "age":30, "city":"New York"}'); Make sure the text is in JSON format, or else you will get a syntax error.
