Converting a JavaScript string containing an `import` statement into a browser-compatible function

Question

Converting a JavaScript string containing an `import` statement into a browser-compatible function

Can my vue application transform the given string into a callable function?

const test = 'import { pi } from "MathPie"; function test() { console.log(pi); } export default test;'

The desired output format is:

import { pi } from "MathPie";

function test() {
  console.log(pi);
}

export default test;

I've attempted to use eval but it does not support import statements.

eval(test)()
> Cannot use import statement outside a module
> Should log '3.14159'

Note: This example is purely for demonstration purposes, I am aware of Math.PI

Is there a way to execute a string containing an import statement? Any suggestions would be appreciated.

javascript vue.js

Answer 1

Answer №1

If you're looking for a solution, you can combine the use of dynamic import() along with createObjectURL().

Here's a test example to help you out:

(async() => { 
  const jsCode = `
export default function defaultTest() { console.log('this is default test func'); };
export function primaryTest() { console.log('this is primary test func'); };
export function secondaryTest() { console.log('this is secondary test func'); };`;

  const blobData = new Blob([jsCode], {
    type: 'text/javascript'
  });
  const url = URL.createObjectURL(blobData);
  const {
    "default": defaultTest,
    primaryTest,
    secondaryTest
  } = await import(url);
  
  defaultTest();
  primaryTest();
  secondaryTest();
})()

Answer 2

If you're looking for a solution, you can combine the use of dynamic import() along with createObjectURL().

Here's a test example to help you out:

(async() => { 
  const jsCode = `
export default function defaultTest() { console.log('this is default test func'); };
export function primaryTest() { console.log('this is primary test func'); };
export function secondaryTest() { console.log('this is secondary test func'); };`;

  const blobData = new Blob([jsCode], {
    type: 'text/javascript'
  });
  const url = URL.createObjectURL(blobData);
  const {
    "default": defaultTest,
    primaryTest,
    secondaryTest
  } = await import(url);
  
  defaultTest();
  primaryTest();
  secondaryTest();
})()

Converting a JavaScript string containing an `import` statement into a browser-compatible function

Answer №1

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