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Create a custom toLowerCase() function in JavaScript
We are required to write a JavaScript String function that overwrite the default toLowerCase() and should have the same functionality as the default function.
Let's write the code for this function −
Example
const str = 'Some UpPerCAsE LeTTeRs!!!';
const toLowerCase = function(){
let str = '';
for(let i = 0; i < this.length; i++){
const ascii = this[i].charCodeAt();
if(ascii >= 65 && ascii <= 90){
str += String.fromCharCode(ascii + 32);
}else{
str += this[i];
};
};
return str;
};
String.prototype.toLowerCase = toLowerCase;
console.log(str.toLowerCase());Output
The output in the console will be −
some uppercase letters!!!
Updated on: 31-Aug-2020
299 Views
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