elementui 中对class和style操作的一些方法（仅记录，详情请翻看element源码）
'use strict';
exports.__esModule = true;
exports.isInContainer = exports.getScrollContainer = exports.isScroll = exports.getStyle = exports.once = exports.off = exports.on = undefined;
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; /* istanbul ignore next */
exports.hasClass = hasClass;
exports.addClass = addClass;
exports.removeClass = removeClass;
exports.setStyle = setStyle;
var _vue = require('vue');
var _vue2 = _interopRequireDefault(_vue);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var isServer = _vue2.default.prototype.$isServer;
var SPECIAL_CHARS_REGEXP = /([\:\-\_]+(.))/g;
var MOZ_HACK_REGEXP = /^moz([A-Z])/;
var ieVersion = isServer ? 0 : Number(document.documentMode);
/* istanbul ignore next */
var trim = function trim(string) {
return (string || '').replace(/^[\s\uFEFF]+|[\s\uFEFF]+$/g, '');
};
/* istanbul ignore next */
var camelCase = function camelCase(name) {
return name.replace(SPECIAL_CHARS_REGEXP, function (_, separator, letter, offset) {
return offset ? letter.toUpperCase() : letter;
}).replace(MOZ_HACK_REGEXP, 'Moz$1');
};
/* istanbul ignore next */
var on = exports.on = function () {
if (!isServer && document.addEventListener) {
return function (element, event, handler) {
if (element && event && handler) {
element.addEventListener(event, handler, false);
}
};
} else {
return function (element, event, handler) {
if (element && event && handler) {
element.attachEvent('on' + event, handler);
}
};
}
}();
/* istanbul ignore next */
var off = exports.off = function () {
if (!isServer && document.removeEventListener) {
return function (element, event, handler) {
if (element && event) {
element.removeEventListener(event, handler, false);
}
};
} else {
return function (element, event, handler) {
if (element && event) {
element.detachEvent('on' + event, handler);
}
};
}
}();
/* istanbul ignore next */
var once = exports.once = function once(el, event, fn) {
var listener = function listener() {
if (fn) {
fn.apply(this, arguments);
}
off(el, event, listener);
};
on(el, event, listener);
};
/* istanbul ignore next */
function hasClass(el, cls) {
if (!el || !cls) return false;
if (cls.indexOf(' ') !== -1) throw new Error('className should not contain space.');
if (el.classList) {
return el.classList.contains(cls);
} else {
return (' ' + el.className + ' ').indexOf(' ' + cls + ' ') > -1;
}
};
/* istanbul ignore next */
function addClass(el, cls) {
if (!el) return;
var curClass = el.className;
var classes = (cls || '').split(' ');
for (var i = 0, j = classes.length; i < j; i++) {
var clsName = classes[i];
if (!clsName) continue;
if (el.classList) {
el.classList.add(clsName);
} else if (!hasClass(el, clsName)) {
curClass += ' ' + clsName;
}
}
if (!el.classList) {
el.setAttribute('class', curClass);
}
};
/* istanbul ignore next */
function removeClass(el, cls) {
if (!el || !cls) return;
var classes = cls.split(' ');
var curClass = ' ' + el.className + ' ';
for (var i = 0, j = classes.length; i < j; i++) {
var clsName = classes[i];
if (!clsName) continue;
if (el.classList) {
el.classList.remove(clsName);
} else if (hasClass(el, clsName)) {
curClass = curClass.replace(' ' + clsName + ' ', ' ');
}
}
if (!el.classList) {
el.setAttribute('class', trim(curClass));
}
};
/* istanbul ignore next */
var getStyle = exports.getStyle = ieVersion < 9 ? function (element, styleName) {
if (isServer) return;
if (!element || !styleName) return null;
styleName = camelCase(styleName);
if (styleName === 'float') {
styleName = 'styleFloat';
}
try {
switch (styleName) {
case 'opacity':
try {
return element.filters.item('alpha').opacity / 100;
} catch (e) {
return 1.0;
}
default:
return element.style[styleName] || element.currentStyle ? element.currentStyle[styleName] : null;
}
} catch (e) {
return element.style[styleName];
}
} : function (element, styleName) {
if (isServer) return;
if (!element || !styleName) return null;
styleName = camelCase(styleName);
if (styleName === 'float') {
styleName = 'cssFloat';
}
try {
var computed = document.defaultView.getComputedStyle(element, '');
return element.style[styleName] || computed ? computed[styleName] : null;
} catch (e) {
return element.style[styleName];
}
};
/* istanbul ignore next */
function setStyle(element, styleName, value) {
if (!element || !styleName) return;
if ((typeof styleName === 'undefined' ? 'undefined' : _typeof(styleName)) === 'object') {
for (var prop in styleName) {
if (styleName.hasOwnProperty(prop)) {
setStyle(element, prop, styleName[prop]);
}
}
} else {
styleName = camelCase(styleName);
if (styleName === 'opacity' && ieVersion < 9) {
element.style.filter = isNaN(value) ? '' : 'alpha(opacity=' + value * 100 + ')';
} else {
element.style[styleName] = value;
}
}
};
var isScroll = exports.isScroll = function isScroll(el, vertical) {
if (isServer) return;
var determinedDirection = vertical !== null && vertical !== undefined;
var overflow = determinedDirection ? vertical ? getStyle(el, 'overflow-y') : getStyle(el, 'overflow-x') : getStyle(el, 'overflow');
return overflow.match(/(scroll|auto)/);
};
var getScrollContainer = exports.getScrollContainer = function getScrollContainer(el, vertical) {
if (isServer) return;
var parent = el;
while (parent) {
if ([window, document, document.documentElement].includes(parent)) {
return window;
}
if (isScroll(parent, vertical)) {
return parent;
}
parent = parent.parentNode;
}
return parent;
};
var isInContainer = exports.isInContainer = function isInContainer(el, container) {
if (isServer || !el || !container) return false;
var elRect = el.getBoundingClientRect();
var containerRect = void 0;
if ([window, document, document.documentElement, null, undefined].includes(container)) {
containerRect = {
top: 0,
right: window.innerWidth,
bottom: window.innerHeight,
left: 0
};
} else {
containerRect = container.getBoundingClientRect();
}
return elRect.top < containerRect.bottom && elRect.bottom > containerRect.top && elRect.right > containerRect.left && elRect.left < containerRect.right;
};
