SOURCE

chartLine = {

    getScale: (min, max, dist) => {
        min = Math.floor(min / dist) * dist;
        max = Math.ceil(max / dist) * dist;
        let length = (max - min) / dist;
        let arr = [];
        for (let i = 0; i < length; i++) {
            arr.push(min + dist * i);
        }
        return arr
    },
    getDist: (height, min, max, dist) => {
        let arr = chartLine.getScale(min, max, dist)
        return arr
    }
}


let min = 19, max = 85, distance = 20;
let arr = chartLine.getDist(600, min, max, distance);
console.log(arr)
console.log(arr.findIndex((val) => { return val == 0 })) // 找不到 0 的时候返回 -1