如何在 eval() javascript 中将参数传递给字符串？

Question

Let we have the user input stored in a variable t,

let t = '[1,2,3,4].map(e=>"<div>{{ e }}</div>")'; .

Whereby a user is forced to write this syntax to execute, so on

t = t.replace(/\\{\\{(.*)?\\}\\}/g,"$1"); .

We will be getting new t as,

t = '[1,2,3,4].map(e=>"<div> e </div>")' .

So now the question arises is how to pass this string to eval so that it considers it as an argument variable not the String. So, the output becomes,

<div>1</div><div>2</div><div>3</div><div>4</div> .

Answer 1

The answer would not be the same depending on the user input. In the current case, this code would work.

 t = '[1,2,3,4].map(e=>`<div> ${e} </div>`)'

you can get this string from the original as follows.

 t = t.replace(/"/g, '`').replace(/\\{\\{(.*)?\\}\\}/g, "${$1}")

Answer 2

This would work:

 let t = '[1,2,3,4].map(e=>"<div>{{"+e+"}}</div>")'; t = t.replace(/\\{\\{(.*)?\\}\\}/g,"$1"); t = eval(t); t.forEach(v => {document.write(v)});