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January 6, 2020 12:32
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Vanilla Javascript smooth scrolling with some options (uses Es6 and behavior)
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/** | |
* Smooth scroll to element (just modern browsers) | |
* @param {HTMLElement|String} elm | |
* @param options | |
* | |
* @example scrollTo('.element img'); | |
* @example scrollTo(document.getElementById('element')) | |
*/ | |
const scrollTo = (elm, options = { | |
offset: 0, | |
delay: 0 | |
}) => { | |
if (!elm) { | |
return; | |
} | |
let element = elm; | |
const doScroll = () => { | |
if (typeof elm === 'string') { | |
element = document.querySelector(elm); | |
} | |
let offset = options.offset ? element.offsetTop - options.offset : element.offsetTop; | |
try { | |
if (element.offsetTop) { | |
window.scroll({ | |
behavior: 'smooth', | |
left: 0, | |
top: offset | |
}); | |
} else { | |
console.error('element has no offsetTop !') | |
} | |
} catch (e) { | |
console.error(e); | |
} | |
}; | |
if (options.delay && options.delay > 0) { | |
setTimeout(doScroll, options.delay) | |
} else { | |
doScroll(); | |
} | |
}; | |
export default scrollTo |
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