おもしろいスライダ検証
6393 ワード
Document
//
const PositionMove = function () {
let id = 0;
class PositionMove {
constructor({ el, direction = 'right' }) {
this.id = ++id;
this.el = el;
this.elWidth = el.offsetWidth;
const parent = el.parentNode;
this.parent = parent;
this.parentOffsetLeftWithClient = parent.getBoundingClientRect().left;
//
this.isToggleTouchend = false;
this.done = false;
this.start = 0;
this.end = parent.offsetWidth - this.elWidth;
this.init();
}
init() {
this.isOnMove = false;
//
Object.assign(this, {
touchstart: this.touchstart.bind(this),
touchend: this.touchend.bind(this),
touchmove: this.touchmove.bind(this),
});
this.bindEvents();
}
destory() {
this.unbindEvents();
Object.keys(this).forEach(k => {
delete this[k];
});
console.log(this);
}
bindEvents() {
this.parent.addEventListener('mousedown', this.touchstart);
this.parent.addEventListener('mouseup', this.touchend);
this.parent.addEventListener('mouseleave', this.touchend);
this.parent.addEventListener('mousemove', this.touchmove, { passive: true });
}
unbindEvents() {
this.parent.removeEventListener('mousedown', this.touchstart);
this.parent.removeEventListener('mouseup', this.touchend);
this.parent.removeEventListener('mouseleave', this.touchend);
this.parent.removeEventListener('mousemove', this.touchmove, { passive: true });
}
touchstart() {
this.isOnMove = true;
this.isToggleTouchend = false;
}
touchend(evt) {
// fix
if (evt.type === 'mouseleave' && !this.isOnMove) return;
if (this.isToggleTouchend) return;
this.isToggleTouchend = true;
this.isOnMove = false;
if (!this.done) {
this.el.style.left = '0';
} else {
this.el.style.left = (this.start = this.end) + 'px';
}
this.notify();
}
touchmove(evt) {
if (!this.isOnMove) return;
this.start = evt.clientX - this.parentOffsetLeftWithClient;
this.el.style.left = this.start + 'px';
if (this.start >= this.end) {
this.done = true;
this.touchend(evt);
this.destory();
return;
}
// ， touchend
this.notify();
}
notify() {
this.onchange && this.onchange({
start: this.start,
end: this.end,
});
if (!this.isOnMove) {
if (this.done) {
this.onsuccess && this.onsuccess();
} else {
this.oncancel && this.oncancel();
}
}
}
// interface
// @{function} onchange
};
return PositionMove;
}();
class DragValidate {
getEl(el) {
el = document.querySelector(el);
// fix el
el.style.position = 'relative';
el.style.height = '100%';
el.style.userSelect = 'none';
return el;
}
constructor({ el: selector, ...options }) {
/**
el ， wrapper ，
clientWidth、scrollWidth
*/
const el = this.el = this.getEl(selector);
if (!this.el) throw (' ');
//
this.width = el.offsetWidth;
this.height = el.offsetHeight;
if (this.width === 0 || !this.height === 0) return console.log(' ');
this.init();
}
init() {
this.hand = this.createHand();
this.hand.onchange = function ({ start, end }) {
console.log(start / end, '%');
}
this.hand.onsuccess = function () {
console.log(' ');
}
this.hand.oncancel = function () {
console.log(' ');
}
}
createHand() {
// dom，
const block = document.createElement('div');
block.style.cssText = `
position:absolute;
left:0;
top:0;
bottom:0;
width:${this.height}px;
background-color:blue;`;
this.el.appendChild(block);
const action = new PositionMove({
el: block,
});
return action;
}
}
const test = new DragValidate({
el: '#test',
});