Javascript：转义字符（\b、\f、\v）是否可以安全地用作用户输入数据和 localStorage 的连接符？

Question

According to this document these escape codes ( \b \f \v ) refer to backspace, form feed and vertical tabulator.

I was thinking I could use one of these characters to concatenate some user entered data that I'm going to store in a localStorage key. As far as I'm aware there's no simple way a user would input one of these characters in a form field but I thought I would ask here to be sure.

Answer 1

You can do that, but it is not how you should structure multiple data into one string.

Instead format your data as JSON with JSON.stringify . And then to read those again, parse it to the original data with JSON.parse .

For instance, to store your input values:

let allMyInputValues = [
    document.querySelector("#input1").value,
    document.querySelector("#input2").value
    // ...etc
];
let json = JSON.stringify(allMyInputValues);
localStorage.setItem("myform", json);

And to read them again into the form:

let json = localStorage.getItem("myform"); 
let allMyInputValues = JSON.parse(json);
document.querySelector("#input1").value = allMyInputValues[0];
document.querySelector("#input2").value = allMyInputValues[1];
// ...etc