You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
27 lines
961 B
27 lines
961 B
4 years ago
|
const range = document.getElementById('range')
|
||
|
|
|
||
|
|
range.addEventListener('input', (e) => {
|
||
|
|
const value = +e.target.value
|
||
|
|
const label = e.target.nextElementSibling
|
||
|
|
|
||
|
|
const range_width = getComputedStyle(e.target).getPropertyValue('width')
|
||
|
|
const label_width = getComputedStyle(label).getPropertyValue('width')
|
||
|
|
|
||
|
|
const num_width = +range_width.substring(0, range_width.length - 2)
|
||
|
|
const num_label_width = +label_width.substring(0, label_width.length - 2)
|
||
|
|
|
||
|
|
const max = +e.target.max
|
||
|
|
const min = +e.target.min
|
||
|
|
|
||
|
|
const left = value * (num_width / max) - num_label_width / 2 + scale(value, min, max, 10, -10)
|
||
|
|
|
||
|
|
label.style.left = `${left}px`
|
||
|
|
|
||
|
|
|
||
|
|
label.innerHTML = value
|
||
|
|
})
|
||
|
|
|
||
|
|
// https://stackoverflow.com/questions/10756313/javascript-jquery-map-a-range-of-numbers-to-another-range-of-numbers
|
||
|
|
const scale = (num, in_min, in_max, out_min, out_max) => {
|
||
|
|
return (num - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
|
||
|
|
}
|