how to remove the specific char of a string in javascript code example

Example 1: how to remove lasr char from string in javascript

str=str.slice(0, -1);

Example 2: javascript remove specific character from string

var newString = oldString.replaceAll("character/string goes here", "");

// Example
var oldString = "Hello World!";
var newString = oldString.replaceAll("o", "");
console.log(newString);
// Prints 'Hell Wrld!' to console.