Function createSticky(sticky) { if (typeof sticky ==

Question

Function createSticky(sticky) { if (typeof sticky ==

undefined) return;

var pos = sticky.getBoundingClientRect().top;

window.addEventListener("scroll", function() {
this.pageYOffset > pos ? sticky.classList.add("custom-sticky") : sticky.classList.remove("custom-sticky");
});
}

0

09.03.2019

5 ответов

32 просмотра

Cesar Frick

Code looks ok but you may want to debounce that scroll

0

09.03.2019

Sina

typeof sticky will never be undefined it will be a string like 'undefined' or 'number' etc.

0

09.03.2019

ＭＵＴＨＵ・ＫＵＭＡＲ「メーカー」 🔺

typeof sticky === 'undefined'

0

09.03.2019

Cesar Frick

Btw, sticky can't be undefined, it will be either a DOM node or null, if (!sticky) is a better check

0

09.03.2019

Cesar Frick · Accepted Answer

Cesar Frick

Instead of using a single backstick, use three and create a block, it reads better

0

09.03.2019

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