how to make first letter uppercase in javascript code example

Example 1: javascript capitalize words

//capitalize only the first letter of the string. 
function capitalizeFirstLetter(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
}
//capitalize all words of a string. 
function capitalizeWords(string) {
    return string.replace(/(?:^|\s)\S/g, function(a) { return a.toUpperCase(); });
};

Example 2: javascript capitalize first letter

const lower = 'this is an entirely lowercase string';
const upper = lower.charAt(0).toUpperCase() + lower.substring(1);

Example 3: javascript first letter uppercase

const upperCase = function(names){
    const toLower = names.toLowerCase().split(' ');
    const namesUpper = [];
    for(const wordName of toLower){
        namesUpper.push(wordName[0].toUpperCase() + wordName.slice(1));
    }
    return namesUpper.join(' ');
}

Example 4: captitalize js

function capitalize2(str) {
  str = str.toLowerCase();

  const arrOfWords = str.split(" ");

  const arrOfWordsCased = [];

  for (let i = 0; i < arrOfWords.length; i++) {
    const char = arrOfWords[i].split("");
    char[0] = char[0].toUpperCase();

    res.push(char.join(""));
  }
  return arrOfWordsCased.join(" ");
}

Example 5: capitalize first letter in each word javascript

search function

<ion-input [(ngModel)]="keyword" (ngModelChange)="toTitleCase($event)"  class="input-container" placeholder="Enter Input"></ion-input>


function capital_letter(str) 
{
    str = str.split(" ");

    for (var i = 0, x = str.length; i < x; i++) {
        str[i] = str[i][0].toUpperCase() + str[i].substr(1);
    }

    return str.join(" ");
}

console.log(capital_letter("Write a JavaScript program to capitalize the first letter of each word of a given string."));