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【百家号】脸书百科,webProject demo-1 wordsRemove Web程序

标签:bind   body   input   cto   ora   信息   color   代码实现   time   

// 数组方式实现文字搬运效果

结构部分

<!DOCTYPE html>
<html lang="en" dir="ltr">
    <head>
        <meta charset="utf-8">
        <title>文字搬运</title>
        <style>
            * {
                margin: 0;
                padding: 0;
            }

            #my-wordsRemove {
                position: relative;
                width: 800px;
                height: 300px;
                padding: 10px;
                border: 5px solid #CCC;
                margin: 10px auto;
            }

            #inputArea {
                float: left;
                position: relative;
                top: -2px;
                left: -2px;
                width: 37.5%; /*300px*/
                height: 100%;
                border: 2px dashed black;
                background: #C63;
                outline: 1px solid black;
            }

            #inputArea > textarea {
                width: 100%;
                height: 100%;
                border: 0px; /*默认有个 border*/
                background: #C63;
                /*maxlength: 280px; 最大字符长度*/
                font-size: 16px;
                line-height: 30px; /*行距*/
                color: #FFF;
            }

            #midArea {
                float: left;
                position: relative;
                top: -2px;
                width: 120px;
                /*(800 - (300 + 2 + 2)*2 - 120)/2; relative不影响布局,相对于原来的布局位置偏移,但还占着原来的位置*/
                margin: 0 36px;
                outline: 1px solid black;
                text-align: center; /*盒模型里面内容居中*/
            }

            #midArea>#btn {
                width: 100px;
                height: 30px;
                background: #F60;
                font-size: 16px;
                line-height: 30px;
                color: #FFF;
                border: 0;
                cursor: pointer;
            }

            #midArea strong {
                margin-top: 10px;
                display: inline-block;
            }

            #midArea ul {
                list-style: none;
                margin-top: 30px;
                margin-left: 10px;
                display: none;
            }

            #midArea ul>li {
                width: 12px;
                height: 12px;
                background: #FC6;
                float: left;
                margin-right: 10px;
            }

            #outputArea {
                float: right;
                position: relative;
                top: -2px;
                right: -2px;
                width: 37.5%; /*300px*/
                height: 100%;
                border: 2px dashed black;
                background: #FC6;
                outline: 1px solid black;
            }

            #outputArea > textarea {
                width: 100%;
                height: 100%;
                border: 0px; /*默认有个 border*/
                background: #FC6;
                /*maxlength: 280px; 最大字符长度*/
                font-size: 16px;
                line-height: 30px;
                color: #333;
            }
        </style>
    </head>
    <body>
        <div id="my-wordsRemove">
            <div id="inputArea">
                <textarea rows="20" cols="20"></textarea>
            </div>
            <div id="midArea">
                <input id="btn" type="button" value="文字右移"/>
                <strong>0/0</strong>
                <ul>
                    <li class="li-selected"></li>
                    <li></li>
                    <li></li>
                    <li></li>
                    <li></li>
                </ul>
            </div>
            <div id="outputArea">
                <textarea rows="20" cols="20"></textarea>
            </div>
        </div>
        <!-- <script src="原始代码实现.js"></script> -->
        <!-- <script src="wordsRemove.js"></script> -->
        <script src="control.js"></script>
    </body>
</html>

API 和 控制流

class WordsRemove {
    constructor(id) {
        this.container = document.getElementById(id);
        this.inputArea = this.container.querySelector(‘#inputArea‘)
        .querySelector("textarea");
        this.outputArea = this.container.querySelector(‘#outputArea‘)
        .querySelector("textarea");
        this.midArea = this.container.querySelector(‘#midArea‘);

        this.ul = this.midArea.querySelector("ul");
        this.lis = this.midArea.querySelectorAll(‘li‘);
        this.strong = this.midArea.querySelector(‘strong‘);

        // 计时器变量;
        this.rollTimer = null; 
        this.textMoveTimer = null;

        // UI控制流部分 
        const btn = this.midArea.querySelector(‘#btn‘);

        if(btn) {
            btn.addEventListener(‘click‘, evt => {
                this.inputLength = this.getInputLength();

                // 判断输入框中是否有文字
                if(this.inputLength == 0) {
                    alert(‘请输入文本信息‘);
                    return;
                }
                
                // 改变控制按钮状态
                btn.style.background= "#ccc";

                // 清空输出框内容
                this.clearOutput();

                // 初始化roll显示状态
                this.initiRoll();
                
                // roll 效果
                this.rollTimer = setInterval(this.roll.bind(this), 50);

                // 文字右移
                this.textMoveTimer =     setInterval(this.textMove.bind(this), 50);
            })
        }
    }

    // API
    // inputArea API
    getInputLength() {
        let length = this.inputArea.value.length;
        return length;
    }

    textMove(){
        let str = this.inputArea.value;
        let arr = str.split(‘‘);

        if(this.getInputLength() == 0){
            clearInterval(this.rollTimer);
            clearInterval(this.textMoveTimer);

            this.ul.style.display = ‘none‘;
            btn.style.background = "";
            return;
        }

        this.outputArea.value += arr.shift();
        this.inputArea.value = arr.join(‘‘);
        this.strong.innerHTML = this.getOutputLength() + ‘/‘ + this.inputLength;

        arr.shift();
    }

    // outputArea API
    
    getOutputLength() {
        let length = this.outputArea.value.length;
        return length;
    }
    
    // 清空输出区域
    clearOutput() {
        this.outputArea.value = ‘‘;
    }
    
    // midArea 辅助API
    // 获得进度条roll显示的 li
    getSelectedItem() {
        let selected = this.midArea.querySelector(‘.li-selected‘);
        return selected;
    }

    // 获得当前进度条roll的 li 编号
    getSelectedItemIndex() {
        return Array.from(this.lis).indexOf(this.getSelectedItem());
    }

    // 跳到目标 li
    rollTo(idx) {
        let selected = this.getSelectedItem();
        if (selected) {
            selected.className = ‘‘;
        }
        let li = this.lis[idx];
        if (li) {
            li.className = ‘li-selected‘;// 不要加·
        }
    }

    // midArea API
    // 初始化状态
    initiRoll() {
        this.ul.style.display = ‘block‘;

        Array.from(this.lis).forEach(li => {
            li.style.background = "";
        })

    }

    // 进度条roll实现
    roll() {
        this.initiRoll();
        let currentIdx = this.getSelectedItemIndex();
        console.log(currentIdx);
        this.lis[currentIdx].style.background = ‘#f30‘;

        let nextIdx = (currentIdx + 1) % this.lis.length;
        this.rollTo(nextIdx);
    }
}

let wordsRemove = new WordsRemove(‘my-wordsRemove‘);             

 

webProject demo-1 wordsRemove

标签:bind   body   input   cto   ora   信息   color   代码实现   time   

原文地址:https://www.cnblogs.com/rencoo/p/9372099.html


本文由百家号/熊掌号作者上传并发布,百家号仅提供信息发布平台。文章仅代表作者个人观点,不代表百度立场。

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