How to replace string for multiple lines in react js - reactjs

Question

Screenshot1 Here i want to replace Special characters"E" with
"bold tag" but it is changing only in one line i want to replace for
all the lines which contains special character E & F please verify the
screenshot for the reference
import React from 'react'; import '../screens/MainScreen.css'; import
{ FaArrowRight } from 'react-icons/fa';
export default function MainScreen() {
// let formData = newFormData();
const onFileChange = async (e) => {
e.preventDefault()
const exampleFileReader = new FileReader()
exampleFileReader.onload = async (e) => {
var text = (e.target.result)
var result = text.replace("\u001bE","<b>").replace('\u001bF','</b>').replace('\u001b-1','<u>').replace('\u001b-0','</u>');
console.log(result,"result")
};
exampleFileReader.readAsText(e.target.files[0]) };
return (
<div>
<center>
<img src={Pic} style={{ width: '120px', height: '100px', marginTop: '40px' }} />
<h1 style={{
color: 'red', fontSize: 50,
textAlign: 'center', border: '1px solid green', width: '40%'
}}>Text to PDF Converter</h1>
</center>
<div className="container">
<input type="file" multiple={true} style={{ color: 'white', backgroundColor: "green", padding: 10, fontSize: 20, width: '20%',
paddingTop: 20, paddingBottom: 20 }}
onChange={(e)=>onFileChange(e)} />
<FaArrowRight size={50} color='red' />
<h1 style={{ color: 'white', backgroundColor: "red", padding: 10, fontSize: 20, width: '20%', paddingTop: 20, paddingBottom: 20 }}
>Convert</h1>
<FaArrowRight size={50} color='green' />
<h1 style={{ color: 'white', backgroundColor: "green", padding: 10, fontSize: 20, width: '20%', paddingTop: 20,
paddingBottom: 20 }}>PDF Download</h1>
</div>
</div> ) };

Answer 1

e.target.result is probably not correct, please console.log it and post the general e.target in order to help you better (try this)
const onFileChange = async (e) => {
e.preventDefault()
const exampleFileReader = new FileReader()
exampleFileReader.onload = async (e) => {
var text = (e.target.value)
var result = text.replace("\u001bE","<b>").replace('\u001bF','</b>').replace('\u001b-1','<u>').replace('\u001b-0','</u>');
console.log(result,"result")
};
exampleFileReader.readAsText(e.target.files[0]) };