Ⅰ、机缘
1. 记得是大一、大二的时候就听学校的大牛说，可以通过写 CSDN 博客，来提升自己的代码和逻辑能力，虽然即将到了写作的第六个年头，但感觉这句话依旧受用;
2、今年一整年的创作都没有停止，本年度几乎是每周都来更新一篇我认为有意义的文章;
3、今年依旧持续稳定的通过文章，来描述前端/后端学习与工作的过程中遇到的问题，依旧在通过 CSDN 私聊或者评论中来交流和解决相同问题的C友们;
4、当然C友们阅读文章的力量也是很强大的，可以鞭策着我继续创作：
// 访问量前三名的文章：
5、 实战中的项目经验也有很多：
6 、日常学习过程中的记录
7、通过文章进行技术交流：
其一、经常与C友关于文章中的技术和问题来谈论解决的方法：
其二、 与 C友 交流文章问题和提出更好的方法：
其三、远程帮助 C友 解决 node 与 node-sass 及 sass-loader 等等的问题：
其四、除了评论和私信，也可以通过微信名片联系：
Ⅱ、收获
当然了，在创作后也会后很多收获：
1、访问量达到了 209W + ，3W+ 名粉丝关注了我，有 3000+ 个铁粉；
2、原力达到了 9 级，获得了 2700+ 个赞，1200+ 次评论，5600+ 次收藏，4W+ 次代码片分享；
3、当然了，还有 CSDN 的纪念章：
Ⅲ、日常
1、创作已经是我生活的一部分了，感觉不断地创作与分享也是自我成长的一部分，通过创作能加强自己的记忆力，也算是给自己留下的一笔宝藏了；
2、当然，工作是第一位的，遇到问题可以将问题先记录下来，稍后有时间再解决并总结，然后就创作和分享了；
3、当然在此非常感谢一位好兄弟，在他的影响下我才能不断的写作与分享呀：
Ⅳ、成就
我认为写的最好的文章或代码，永远是在下一篇：
但目前记忆尤新的就是要将 element-ui 中的 Transfer 组件二次改造渲染的需求：
即：(Transfer)解决：Element-ui 中 Transfer 穿梭框因数据量过大而渲染卡顿问题的三种方法；
A、页面展示为：
// 全选也没有问题，几乎立即可以全选;
// 全选大量数据也可以短时间内，向右侧 transfer 过去;
B、代码为：
其一、transfer-checkbox-item.vue 的代码：
<template><el-checkboxclass="el-transfer-panel__item":label="source[keyProp]":disabled="source[disabledProp]"><option-content :option="source"></option-content>
</el-checkbox>
</template><script>import ElCheckbox from 'element-ui/packages/checkbox';export default {name: 'transfer-checkbox-item',props: {index: { // index of current itemtype: Number},source: { // here is: {uid: 'unique_1', text: 'abc'}type: Object,default() {return {};}},keyProp: {type: String},disabledProp: {type: String}},components: {ElCheckbox,OptionContent: {props: {option: Object},render(h) {const getParent = vm => {if (vm.$options.componentName === 'ElTransferPanel') {return vm;} else if (vm.$parent) {return getParent(vm.$parent);} else {return vm;}};const panel = getParent(this);const transfer = panel.$parent || panel;return panel.renderContent? panel.renderContent(h, this.option): transfer.$scopedSlots.default? transfer.$scopedSlots.default({ option: this.option }): <span>{ this.option[panel.labelProp] || this.option[panel.keyProp] }</span>;}}}};
</script>其二、transfer-panel.vue 的代码：
<template><div class="el-transfer-panel"><p class="el-transfer-panel__header"><el-checkboxv-model="allChecked"@change="handleAllCheckedChange":indeterminate="isIndeterminate">{{ title }}<span>{{ checkedSummary }}</span></el-checkbox></p><div :class="['el-transfer-panel__body', hasFooter ? 'is-with-footer' : '']"><el-inputclass="el-transfer-panel__filter"v-model="query"size="small":placeholder="placeholder"@mouseenter.native="inputHover = true"@mouseleave.native="inputHover = false"v-if="filterable"><i slot="prefix":class="['el-input__icon', 'el-icon-' + inputIcon]"@click="clearQuery"></i></el-input><!-- <el-checkbox-groupv-model="checked"v-show="!hasNoMatch && data.length > 0":class="{ 'is-filterable': filterable }"class="el-transfer-panel__list"><el-checkboxclass="el-transfer-panel__item":label="item[keyProp]":disabled="item[disabledProp]":key="item[keyProp]"v-for="item in filteredData"><option-content :option="item"></option-content></el-checkbox></el-checkbox-group> --><el-checkbox-groupv-model="checked"v-show="!hasNoMatch && data.length > 0":class="{ 'is-filterable': filterable }"class="el-transfer-panel__list"><virtual-list v-if="virtualScroll"style="height:100%;overflow-y: auto;":data-key="keyProp":data-sources="filteredData":data-component="itemComponent":extra-props="virtualListProps"/><template v-else><el-checkboxclass="el-transfer-panel__item":label="item[keyProp]":disabled="item[disabledProp]":key="item[keyProp]"v-for="item in filteredData"><option-content :option="item"></option-content></el-checkbox></template></el-checkbox-group><pclass="el-transfer-panel__empty"v-show="hasNoMatch">{{ t('el.transfer.noMatch') }}</p><pclass="el-transfer-panel__empty"v-show="data.length === 0 && !hasNoMatch">{{ t('el.transfer.noData') }}</p></div><p class="el-transfer-panel__footer" v-if="hasFooter"><slot></slot></p></div>
</template><script>import ElCheckboxGroup from 'element-ui/packages/checkbox-group';import ElCheckbox from 'element-ui/packages/checkbox';import ElInput from 'element-ui/packages/input';import Locale from 'element-ui/src/mixins/locale';import Item from './transfer-checkbox-item.vue';import VirtualList from 'vue-virtual-scroll-list';export default {mixins: [Locale],name: 'ElTransferPanel',componentName: 'ElTransferPanel',components: {ElCheckboxGroup,// 注册VirtualList'virtual-list': VirtualList,ElCheckbox,ElInput,OptionContent: {props: {option: Object},render(h) {const getParent = vm => {if (vm.$options.componentName === 'ElTransferPanel') {return vm;} else if (vm.$parent) {return getParent(vm.$parent);} else {return vm;}};const panel = getParent(this);const transfer = panel.$parent || panel;return panel.renderContent? panel.renderContent(h, this.option): transfer.$scopedSlots.default? transfer.$scopedSlots.default({ option: this.option }): <span>{ this.option[panel.labelProp] || this.option[panel.keyProp] }</span>;}}},props: {data: {type: Array,default() {return [];}},renderContent: Function,placeholder: String,title: String,filterable: Boolean,format: Object,filterMethod: Function,defaultChecked: Array,props: Object},data() {return {checked: [],allChecked: false,query: '',inputHover: false,checkChangeByUser: true,itemComponent: Item,virtualListProps: {}};},watch: {checked1(val, oldVal) {this.updateAllChecked();if (this.checkChangeByUser) {const movedKeys = val.concat(oldVal).filter(v => val.indexOf(v) === -1 || oldVal.indexOf(v) === -1);this.$emit('checked-change', val, movedKeys);} else {this.$emit('checked-change', val);this.checkChangeByUser = true;}},checked(val, oldVal) {this.updateAllChecked();let newObj = {};val.every((item)=>{newObj[item] = true;});let oldObj = {};oldVal.every((item)=>{oldObj[item] = true;});if (this.checkChangeByUser) {// O(n)const movedKeys = val.concat(oldVal).filter(v => newObj[v] || oldVal[v]);this.$emit('checked-change', val, movedKeys);} else {this.$emit('checked-change', val);this.checkChangeByUser = true;}},data() {const checked = [];const filteredDataKeys = this.filteredData.map(item => item[this.keyProp]);this.checked.forEach(item => {if (filteredDataKeys.indexOf(item) > -1) {checked.push(item);}});this.checkChangeByUser = false;this.checked = checked;},checkableData() {this.updateAllChecked();},defaultChecked: {immediate: true,handler(val, oldVal) {if (oldVal && val.length === oldVal.length &&val.every(item => oldVal.indexOf(item) > -1)) return;const checked = [];const checkableDataKeys = this.checkableData.map(item => item[this.keyProp]);val.forEach(item => {if (checkableDataKeys.indexOf(item) > -1) {checked.push(item);}});this.checkChangeByUser = false;this.checked = checked;}}},computed: {filteredData() {return this.data.filter(item => {if (typeof this.filterMethod === 'function') {return this.filterMethod(this.query, item);} else {const label = item[this.labelProp] || item[this.keyProp].toString();return label.toLowerCase().indexOf(this.query.toLowerCase()) > -1;}});},virtualScroll() {return this.$parent.virtualScroll;},checkableData() {return this.filteredData.filter(item => !item[this.disabledProp]);},checkedSummary() {const checkedLength = this.checked.length;const dataLength = this.data.length;const { noChecked, hasChecked } = this.format;if (noChecked && hasChecked) {return checkedLength > 0? hasChecked.replace(/\${checked}/g, checkedLength).replace(/\${total}/g, dataLength): noChecked.replace(/\${total}/g, dataLength);} else {return `${ checkedLength }/${ dataLength }`;}},isIndeterminate() {const checkedLength = this.checked.length;return checkedLength > 0 && checkedLength < this.checkableData.length;},hasNoMatch() {return this.query.length > 0 && this.filteredData.length === 0;},inputIcon() {return this.query.length > 0 && this.inputHover? 'circle-close': 'search';},labelProp() {return this.props.label || 'label';},keyProp1() {return this.props.key || 'key';},keyProp() {this.virtualListProps.keyProp = this.props.key || 'key';return this.props.key || 'key';},disabledProp1() {return this.props.disabled || 'disabled';},disabledProp() {this.virtualListProps.disabledProp = this.props.disabled || 'disabled';return this.props.disabled || 'disabled';},hasFooter() {return !!this.$slots.default;}},methods: {updateAllChecked1() {const checkableDataKeys = this.checkableData.map(item => item[this.keyProp]);this.allChecked = checkableDataKeys.length > 0 &&checkableDataKeys.every(item => this.checked.indexOf(item) > -1);},updateAllChecked() {let checkObj = {};this.checked.forEach((item) => {checkObj[item] = true;});this.allChecked =this.checkableData.length > 0 &&this.checked.length > 0 &&this.checkableData.every((item) => checkObj[item[this.keyProp]]);},handleAllCheckedChange(value) {this.checked = value? this.checkableData.map(item => item[this.keyProp]): [];},clearQuery() {if (this.inputIcon === 'circle-close') {this.query = '';}}}};
</script>其三、main.vue 的代码：
<template><div class="el-transfer"><transfer-panelv-bind="$props"ref="leftPanel":data="sourceData":title="titles[0] || t('el.transfer.titles.0')":default-checked="leftDefaultChecked":placeholder="filterPlaceholder || t('el.transfer.filterPlaceholder')"@checked-change="onSourceCheckedChange"><slot name="left-footer"></slot></transfer-panel><div class="el-transfer__buttons"><el-buttontype="primary":class="['el-transfer__button', hasButtonTexts ? 'is-with-texts' : '']"@click.native="addToLeft":disabled="rightChecked.length === 0"><i class="el-icon-arrow-left"></i><span v-if="buttonTexts[0] !== undefined">{{ buttonTexts[0] }}</span></el-button><el-buttontype="primary":class="['el-transfer__button', hasButtonTexts ? 'is-with-texts' : '']"@click.native="addToRight":disabled="leftChecked.length === 0"><span v-if="buttonTexts[1] !== undefined">{{ buttonTexts[1] }}</span><i class="el-icon-arrow-right"></i></el-button></div><transfer-panelv-bind="$props"ref="rightPanel":data="targetData":title="titles[1] || t('el.transfer.titles.1')":default-checked="rightDefaultChecked":placeholder="filterPlaceholder || t('el.transfer.filterPlaceholder')"@checked-change="onTargetCheckedChange"><slot name="right-footer"></slot></transfer-panel></div>
</template><script>import ElButton from 'element-ui/packages/button';import Emitter from 'element-ui/src/mixins/emitter';import Locale from 'element-ui/src/mixins/locale';import TransferPanel from './transfer-panel.vue';import Migrating from 'element-ui/src/mixins/migrating';export default {name: 'ElTransfer',mixins: [Emitter, Locale, Migrating],components: {TransferPanel,ElButton},props: {data: {type: Array,default() {return [];}},virtualScroll: {type: Boolean,default: false},titles: {type: Array,default() {return [];}},buttonTexts: {type: Array,default() {return [];}},filterPlaceholder: {type: String,default: ''},filterMethod: Function,leftDefaultChecked: {type: Array,default() {return [];}},rightDefaultChecked: {type: Array,default() {return [];}},renderContent: Function,value: {type: Array,default() {return [];}},format: {type: Object,default() {return {};}},filterable: Boolean,props: {type: Object,default() {return {label: 'label',key: 'key',disabled: 'disabled'};}},targetOrder: {type: String,default: 'original'}},data() {return {leftChecked: [],rightChecked: []};},computed: {dataObj() {const key = this.props.key;return this.data.reduce((o, cur) => (o[cur[key]] = cur) && o, {});},sourceData1() {return this.data.filter(item => this.value.indexOf(item[this.props.key]) === -1);},sourceData() {let valueObj = {};this.value.forEach((item)=>{valueObj[item] = true;});return this.data.filter((item) => !valueObj[item[this.props.key]]);},targetData1() {if (this.targetOrder === 'original') {return this.data.filter(item => this.value.indexOf(item[this.props.key]) > -1);} else {return this.value.reduce((arr, cur) => {const val = this.dataObj[cur];if (val) {arr.push(val);}return arr;}, []);}},targetData() {if (this.targetOrder === 'original') {let valueObj = {};this.value.forEach((item)=>{valueObj[item] = true;});let data = this.data.filter((item) => valueObj[item[this.props.key]]);return data;} else {return this.value.reduce((arr, cur) => {const val = this.dataObj[cur];if (val) {arr.push(val);}return arr;}, []);}},hasButtonTexts() {return this.buttonTexts.length === 2;}},watch: {value(val) {this.dispatch('ElFormItem', 'el.form.change', val);}},methods: {getMigratingConfig() {return {props: {'footer-format': 'footer-format is renamed to format.'}};},onSourceCheckedChange(val, movedKeys) {this.leftChecked = val;if (movedKeys === undefined) return;this.$emit('left-check-change', val, movedKeys);},onTargetCheckedChange(val, movedKeys) {this.rightChecked = val;if (movedKeys === undefined) return;this.$emit('right-check-change', val, movedKeys);},addToLeft() {let currentValue = this.value.slice();this.rightChecked.forEach(item => {const index = currentValue.indexOf(item);if (index > -1) {currentValue.splice(index, 1);}});this.$emit('input', currentValue);this.$emit('change', currentValue, 'left', this.rightChecked);},addToRight1() {let currentValue = this.value.slice();const itemsToBeMoved = [];const key = this.props.key;this.data.forEach(item => {const itemKey = item[key];if (this.leftChecked.indexOf(itemKey) > -1 &&this.value.indexOf(itemKey) === -1) {itemsToBeMoved.push(itemKey);}});currentValue = this.targetOrder === 'unshift'? itemsToBeMoved.concat(currentValue): currentValue.concat(itemsToBeMoved);this.$emit('input', currentValue);this.$emit('change', currentValue, 'right', this.leftChecked);},addToRight() {let currentValue = this.value.slice();const itemsToBeMoved = [];const key = this.props.key;let leftCheckedKeyPropsObj = {};this.leftChecked.forEach((item) => {leftCheckedKeyPropsObj[item] = true;});let valueKeyPropsObj = {};this.value.forEach((item) => {valueKeyPropsObj[item] = true;});this.data.forEach((item) => {const itemKey = item[key];// O(n)if (leftCheckedKeyPropsObj[itemKey] &&!valueKeyPropsObj[itemKey]) {itemsToBeMoved.push(itemKey);}});currentValue = this.targetOrder === 'unshift'? itemsToBeMoved.concat(currentValue): currentValue.concat(itemsToBeMoved);this.$emit('input', currentValue);this.$emit('change', currentValue, 'right', this.leftChecked);},clearQuery(which) {if (which === 'left') {this.$refs.leftPanel.query = '';} else if (which === 'right') {this.$refs.rightPanel.query = '';}}}};
</script>其四、App.vue 的代码：
<template><div class="greetings" id="app"><newTransfer v-model="value" :data="data" :virtual-scroll="true"></newTransfer></div>
</template><script setup lang="ts">
import { ref } from 'vue'
import newTransfer from './transfer/index.js'const generateData = () => {const data = []for (let i = 1; i <= 149998; i++) {data.push({key: i,label: `Option ${i}`,disabled: i % 4 === 0,})}return data
}const data = ref(generateData())
const value = ref([])
</script>Ⅴ、憧憬
1、职业规划：
大方向不变：在以前端为背景下，不断的学习新的技术，争取做前端领域的大牛，当然在有精力的情况下，想做全栈技术开发，想学一门后端语言，暂定为 java；
2、创作规划：
没有什么大的规划，就是有时间就写，整理问题、代码、遇到问题的解决方案，当然也想做出自己的VIP专栏；
3、还请多多关注博主和我的专栏:
点击进入我的 CSDN 主页
点击进入我的前端VIP专栏
点击进入我的后端(java)VIP专栏
