nutui-by-zchuhyy/dist/packages/backtop/backtop.js

一套轻量级移动端Vue组件库

/*!
 * nutui-by-zchuhyy v0.0.16 - backtop.js, 7c15ab32fbfb9d26339f, Wed Mar 17 2021 16:52:20 GMT+0800 (GMT+08:00)
 * (c) 2017-2020 JDC
 * Released under the MIT License.
 */
!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define("backtop",[],e):"object"==typeof exports?exports.backtop=e():t.backtop=e()}("undefined"!=typeof self?self:this,(function(){return function(t){var e={};function n(i){if(e[i])return e[i].exports;var o=e[i]={i:i,l:!1,exports:{}};return t[i].call(o.exports,o,o.exports,n),o.l=!0,o.exports}return n.m=t,n.c=e,n.d=function(t,e,i){n.o(t,e)||Object.defineProperty(t,e,{enumerable:!0,get:i})},n.r=function(t){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})},n.t=function(t,e){if(1&e&&(t=n(t)),8&e)return t;if(4&e&&"object"==typeof t&&t&&t.__esModule)return t;var i=Object.create(null);if(n.r(i),Object.defineProperty(i,"default",{enumerable:!0,value:t}),2&e&&"string"!=typeof t)for(var o in t)n.d(i,o,function(e){return t[e]}.bind(null,o));return i},n.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return n.d(e,"a",e),e},n.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},n.p="./",n(n.s=184)}({0:function(t,e,n){"use strict";function i(t,e,n,i,o,r,s,l){var c,a="function"==typeof t?t.options:t;if(e&&(a.render=e,a.staticRenderFns=n,a._compiled=!0),i&&(a.functional=!0),r&&(a._scopeId="data-v-"+r),s?(c=function(t){(t=t||this.$vnode&&this.$vnode.ssrContext||this.parent&&this.parent.$vnode&&this.parent.$vnode.ssrContext)||"undefined"==typeof __VUE_SSR_CONTEXT__||(t=__VUE_SSR_CONTEXT__),o&&o.call(this,t),t&&t._registeredComponents&&t._registeredComponents.add(s)},a._ssrRegister=c):o&&(c=l?function(){o.call(this,(a.functional?this.parent:this).$root.$options.shadowRoot)}:o),c)if(a.functional){a._injectStyles=c;var u=a.render;a.render=function(t,e){return c.call(e),u(t,e)}}else{var d=a.beforeCreate;a.beforeCreate=d?[].concat(d,c):[c]}return{exports:t,options:a}}n.d(e,"a",(function(){return i}))},118:function(t,e,n){},184:function(t,e,n){"use strict";n.r(e);var i={name:"nut-backtop",props:{distance:{type:Number,default:200},bottom:{type:Number,default:20},right:{type:Number,default:10},duration:{type:Number,default:1e3},isAnimation:{type:Boolean,default:!0},elId:{type:String,default:""},zIndex:{type:Number,default:1111}},data:function(){return{backTop:!1,scrollEl:window}},mounted:function(){this.init()},activated:function(){this.keepAlive&&(this.keepAlive=!1,this.init())},deactivated:function(){this.keepAlive=!0,this.removeEventListener()},destroyed:function(){this.removeEventListener()},computed:{styles:function(){return{bottom:"".concat(this.bottom,"px"),right:"".concat(this.right,"px"),"z-index":this.zIndex}}},methods:{addEventListener:function(){this.scrollEl.addEventListener("scroll",this.scrollListener,!1),this.scrollEl.addEventListener("resize",this.scrollListener,!1)},removeEventListener:function(){this.scrollEl.removeEventListener("scroll",this.scrollListener,!1),this.scrollEl.removeEventListener("resize",this.scrollListener,!1)},requestAniFrame:function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||function(t){window.setTimeout(t,1e3/60)}},initCancelAniFrame:function(){for(var t=["webkit","moz"],e=0;e<t.length&&!window.requestAnimationFrame;++e)window.cancelAnimationFrame=window[t[e]+"CancelAnimationFrame"]||window[t[e]+"CancelRequestAnimationFrame"]},init:function(){this.elId&&document.getElementById(this.elId)&&(this.scrollEl=document.getElementById(this.elId)),this.addEventListener(),this.initCancelAniFrame()},scrollListener:function(){this.scrollTop=void 0!==this.scrollEl.pageYOffset?this.scrollEl.pageYOffset:this.scrollEl.scrollTop,this.backTop=this.scrollTop>=this.distance},click:function(){this.startTime=+new Date,this.isAnimation&&this.duration>0?this.scrollAnimation():this.scroll(),this.$emit("click")},scrollAnimation:function(){var t=this,e=t.requestAniFrame()((function n(){var i=t.duration-Math.max(0,t.startTime-+new Date+t.duration),o=i*-t.scrollTop/t.duration+t.scrollTop;t.scroll(o),e=t.requestAniFrame()(n),i!=t.duration&&0!=o||window.cancelAnimationFrame(e)}))},scroll:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:0;this.scrollEl===window?window.scrollTo(0,t):this.scrollEl.scrollTop=t}}},o=n(0),r=Object(o.a)(i,(function(){var t=this,e=t.$createElement,n=t._self._c||e;return n("div",{class:["nut-backtop",{show:t.backTop}],style:t.styles,on:{click:function(e){return e.stopPropagation(),t.click(e)}}},[t._t("default",[n("div",{staticClass:"nut-backtop-main"})])],2)}),[],!1,null,null,null).exports;n(118);r.install=function(t){t.component(r.name,r)};e.default=r}})}));
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