How to set the adaptive size of echarts

Methods to set the adaptive size of echarts include percentage setting of container size, resize event listener and CSS media query. Detailed introduction: 1. Set the container size by percentage, by setting the width and height of the chart container to percentage values; 2. The resize event listener, by listening to changes in the window size, can reset the width and height of the chart when the window size changes. ; 3. CSS media query, by defining different style rules in CSS, the size of the chart container can be set according to the width and height of the screen.

ECharts is a JavaScript-based open source visualization library for creating interactive and dynamic charts and graphs. It provides rich chart types and flexible configuration options, allowing developers to easily create a wide variety of data visualizations.

When using ECharts, a common requirement is to make the chart self-resizing to accommodate different devices and screen sizes. The following will introduce several common methods to set the adaptive size of ECharts charts.

1. Use percentages to set the container size:

By setting the width and height of the chart container to percentage values, you can make the chart adapt to the size of the parent container. For example, you can set the width of the chart container to "100%" and the height to "100%" so that the chart automatically adjusts to the size of the parent container.

var chart = echarts.init(document.getElementById('chart'));

2. Use a resize event listener:

Another method is to use a resize event listener to dynamically resize the chart. By listening for window size changes, you can reset the width and height of the chart when the window size changes.

var chart = echarts.init(document.getElementById('chart'));
window.addEventListener('resize', function() {
chart.resize();
});

This way, when the window size changes, the chart will automatically resize to fit the new window size.

3. Use CSS media queries:

You can use CSS media queries to set the width and height of the chart according to different screen sizes. By defining different style rules in CSS, the chart container can be sized according to the width and height of the screen.

<style>
   @media (max-width: 768px) {
     #chart {
       width: 100%;
       height: 300px;
     }
   }
   @media (min-width: 768px) {
     #chart {
       width: 100%;
       height: 500px;
     }
   }
   </style>
   <div id="chart"></div>

In this way, when the screen width is less than 768px, the height of the chart container will be 300px, and when the screen width is greater than or equal to 768px, the height of the chart container will be 500px.

The above are several commonly used methods to set the adaptive size of ECharts charts. Depending on the specific needs and scenarios, you can choose a suitable method to implement chart adaptation. Whether setting container sizes using percentages, using resize event listeners, or using CSS media queries, developers can create charts that adapt to different devices and screen sizes. .

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