Echarts是由百度提供的數據可視化解決方案, 可以讓我們快速實現功能豐富的圖表,官網鏈接
使用方法
1.引入echarts.min.js文件
下載echarts.min.js文件,下載地址
創建一個掛載節點
將數據展示到掛載節點
生成數據, 并將數據導入到option配置對象中
// 創建數據 var base = +new Date(1968, 9, 3); var oneDay = 24 * 3600 * 1000; var date = []; var data = [Math.random() * 300]; for (var i = 1; i < 20000; i++) { var now = new Date(base += oneDay); date.push([now.getFullYear(), now.getMonth() + 1, now.getDate()].join('/')); data.push(Math.round((Math.random() - 0.5) * 20 + data[i - 1])); } // 創建對象option option = { tooltip: { trigger: 'axis', position: function (pt) { return [pt[0], '10%']; } }, title: { left: 'center', text: '大數據量面積圖', }, toolbox: { feature: { dataZoom: { yAxisIndex: 'none' }, restore: {}, saveAsImage: {} } }, xAxis: { type: 'category', boundaryGap: false, data: date }, yAxis: { type: 'value', boundaryGap: [0, '100%'] }, dataZoom: [{ type: 'inside', start: 0, end: 10 }, { start: 0, end: 10, handleIcon: 'M10.7,11.9v-1.3H9.3v1.3c-4.9,0.3-8.8,4.4-8.8,9.4c0,5,3.9,9.1,8.8,9.4v1.3h1.3v-1.3c4.9-0.3,8.8-4.4,8.8-9.4C19.5,16.3,15.6,12.2,10.7,11.9z M13.3,24.4H6.7V23h6.6V24.4z M13.3,19.6H6.7v-1.4h6.6V19.6z', handleSize: '80%', handleStyle: { color: '#fff', shadowBlur: 3, shadowColor: 'rgba(0, 0, 0, 0.6)', shadowOffsetX: 2, shadowOffsetY: 2 } }], series: [ { name:'模擬數據', type:'line', smooth:true, symbol: 'none', sampling: 'average', itemStyle: { color: 'rgb(255, 70, 131)' }, areaStyle: { color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{ offset: 0, color: 'rgb(255, 158, 68)' }, { offset: 1, color: 'rgb(255, 70, 131)' }]) }, data: data } ] };將option添加到掛載節點
// 將option數據掛載到main節點echarts.init(document.getElementById('main')).setOption(option);
如何防止坐標軸越界
上方圖表如果展示到移動版, 坐標軸可能部分無法顯示
解決方法很簡單,只需在option中加一個配置項即可
grid:{ containLabel: true },
源碼:
<!doctype html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Echarts-Demo</title> <script src="./echarts.min.js"></script></head><body> <div id="main" style="width:100%;height:400px;"></div> <script> // 創建數據 var base = +new Date(1968, 9, 3); var oneDay = 24 * 3600 * 1000; var date = []; var data = [Math.random() * 300]; for (var i = 1; i < 20000; i++) { var now = new Date(base += oneDay); date.push([now.getFullYear(), now.getMonth() + 1, now.getDate()].join('/')); data.push(Math.round((Math.random() - 0.5) * 20 + data[i - 1])); } // 創建對象option option = { tooltip: { trigger: 'axis', position: function (pt) { return [pt[0], '10%']; } }, title: { left: 'center', text: '大數據量面積圖', }, toolbox: { feature: { dataZoom: { yAxisIndex: 'none' }, restore: {}, saveAsImage: {} } }, xAxis: { type: 'category', boundaryGap: false, data: date }, yAxis: { type: 'value', boundaryGap: [0, '100%'] }, dataZoom: [{ type: 'inside', start: 0, end: 10 }, { start: 0, end: 10, handleIcon: 'M10.7,11.9v-1.3H9.3v1.3c-4.9,0.3-8.8,4.4-8.8,9.4c0,5,3.9,9.1,8.8,9.4v1.3h1.3v-1.3c4.9-0.3,8.8-4.4,8.8-9.4C19.5,16.3,15.6,12.2,10.7,11.9z M13.3,24.4H6.7V23h6.6V24.4z M13.3,19.6H6.7v-1.4h6.6V19.6z', handleSize: '80%', handleStyle: { color: '#fff', shadowBlur: 3, shadowColor: 'rgba(0, 0, 0, 0.6)', shadowOffsetX: 2, shadowOffsetY: 2 } }], series: [ { name:'模擬數據', type:'line', smooth:true, symbol: 'none', sampling: 'average', itemStyle: { color: 'rgb(255, 70, 131)' }, areaStyle: { color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{ offset: 0, color: 'rgb(255, 158, 68)' }, { offset: 1, color: 'rgb(255, 70, 131)' }]) }, data: data } ], grid:{ containLabel: true } }; // 將option數據掛載到main節點 echarts.init(document.getElementById('main')).setOption(option); </script></body></html>小結:
上面實例有一個在線的版本,http://echarts.baidu.com/examples/editor.html?c=area-simple, 感興趣可以打開網頁, 體會一下各種配置項的用途
博主開始沒有找到正確的解決方法, 導致走了彎路, 最后發現添加一個參數就能順利解決, 這里分享給大家,希望沉迷開發的小伙伴, 能少走彎路
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
新聞熱點
疑難解答
