javascript replace all space code example

Example 1: js replace all spaces

var replaced = str.replace(/ /g, '_');

Example 2: javascript replace all space

// replaces space with '_'
str = str.replace(/ /g, "_");
// or
str = str.split(' ').join('_');

Example 3: javascript replace all spaces

var str = 'a b c';
var replaced = str.split(' ').join('_');