Replacing one string with another

Room 51

Get Programming with JavaScript - Listing 19.02

Listing 19.02 - Replacing one string with another


var before = "<h3>Replacing one string with another</h3>";

var after = before.replace("Replacing one string with another", "Fitness App v1.0 Live!");

console.log(before);
console.log(after);

Further Adventures

Listing 19.02 - Replacing one string with another - Tasks 2 & 3

Declare a title variable and assign it a value.
Use before.replace to replace the Replacing one string with another placeholder with the value of the title variable, rather than with a string literal.


var before = "<h3>Replacing one string with another</h3>";
var title = "Fitness App v1.0 Live!";

var after = before.replace("Replacing one string with another", title);

console.log(before);
console.log(after);

Listing 19.02 - Replacing one string with another - Tasks 4 & 5

Include a second placeholder in the original string.
Use the replace method to fill both your placeholder and Replacing one string with another with a value.


var before = "<h3>Replacing one string with another</h3><p></p>";
var title = "Fitness App v1.0 Live!";
var msg = "Finally, the app is available...";

var after = before.replace("Replacing one string with another", title);
after = after.replace("", msg);

console.log(before);
console.log(after);