Today I Learned - Rocky Kev

TIL Default Params in Javascript

POSTED ON:

TAGS: javascript

ES6 version:

function say(message='Hi') {
    console.log(message);
}

say(); // 'Hi'
say(undefined); // 'Hi'
say('Hello'); // 'Hello'


function createDiv(height = '100px', width = '100px', border = 'solid 1px red') {
    let div = document.createElement('div');
    div.style.height = height;
    div.style.width = width;
    div.style.border = border;
    document.getElementsByTagName('body')[0].appendChild(div);
    return div;
}

reference

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