本文实例为大家分享了js拖拉表格实现内容计算的具体代码，供大家参考，具体内容如下
前言
- 制作网页版Excel
- H5新增功能：可拖拉-draggable, 可编辑-contenteditable
实现结果
代码实现
index.html
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Table</title> <style> table, th, tr, td { margin: 0; padding: 0; width: 800px; text-align: center; border: solid 1px #000; } td { width: auto; background-color: pink; } .ops { cursor: move; } </style></head><body><table id="table"> <thead id="thead"> <tr id="header"> <th>1</th> </tr> </thead> <tbody id="tbody"> </tbody></table><script src="main.js"></script></body></html> |
main.js
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createTable(10,10);init();// 表格初始化// @param1: rows, 行数// @param2: cols, 列数function createTable(rows, cols) { let header = document.getElementById('header'), body = document.getElementById('tbody'); for (let i = 0; i < rows; i ++){ let tmp = '', trEle = document.createElement('tr'); for (let j = 0; j < cols; j ++){ //thead if (i <= 1){ tmp += `<th>${j}</th>`; } else { tmp += `<td class="ops" draggable="true">${i}</td>`; } } // console.log(tmp); if (i <= 1) header.innerHTML = tmp; else{ trEle.innerHTML = tmp; body.appendChild(trEle); } }}/** 表格拖拽* */function init(){ let x,y,data; document.body.addEventListener('click', event=>{ event.preventDefault(); }); document.body.addEventListener('dragstart', event => { if (event.target.nodeName.toLowerCase() !== 'td'){ alert('选择正确的内容'); return false; } // console.log(event); x = event.clientX - 5, y = event.clientY - 5, data = parseInt(event.target.firstChild.data); let img = new Image(); img.src = 'test.png'; event.dataTransfer.setDragImage(img, 0,0); // console.log(x, y, data); }); //阻止默认处理 document.body.addEventListener('dragover', event => { event.preventDefault(); }); document.body.addEventListener('drop', event => { let tmp = new dragCalculation(x,y,data); let endX = event.clientX - 5, endY = event.clientY - 5, endData = parseInt(event.target.firstChild.data); // console.log(event.target.firstChild.data); // console.log(isNaN(endData)) if (isNaN(endData)) { alert('移动位置错误'); return false; } // console.log(endX, endY, endData); let result = tmp.sum(endX, endY, endData); event.target.firstChild.data = result; event.target.style.backgroundColor = '#b4e318' });}let dragCalculation = function (x, y, data){ this.startX = x; this.startY = y; this.startData = data;};dragCalculation.prototype.sum = function (x, y, data) { //应该详细的边界判断 if (this.startX == x || this.startY == y || isNaN(data)) { alert('不要放在原地不动'); return false; }// 取和 return data + this.startData;} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/u013362192/article/details/115837290
