JavaScript Method Chaining Method Chaining
Example
Method chaining is a programming strategy that simplifies your code and beautifies it. Method chaining is done by ensuring that each method on an object returns the entire object, instead of returning a single element of that object. For example:
function Door() {
this.height = '';
this.width = '';
this.status = 'closed';
}
Door.prototype.open = function() {
this.status = 'opened';
return this;
}
Door.prototype.close = function() {
this.status = 'closed';
return this;
}
Door.prototype.setParams = function(width,height) {
this.width = width;
this.height = height;
return this;
}
Door.prototype.doorStatus = function() {
console.log('The',this.width,'x',this.height,'Door is',this.status);
return this;
}
var smallDoor = new Door();
smallDoor.setParams(20,100).open().doorStatus().close().doorStatus();
Note that each method in Door.prototype returns this, which refers to the entire instance of that Door object.
