HTMLImageElement.x

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只读 HTMLImageElement property x indicates the x-coordinate of the <img> element's left border edge relative to the root element's origin.

x and y properties are only valid for an image if its display property has the computed value table-column or table-column-group . In other words: it has either of those values set explicitly on it, or it has inherited it from a containing element, or by being located within a column described by either <col> or <colgroup> .

句法

let imageX = htmlImageElement.x;

值

An integer value indicating the distance in pixels from the left edge of the element's nearest root element and the left edge of the <img> element's border box. The nearest root element is the outermost <html> element that contains the image. If the image is in an <iframe> , its x is relative to that frame.

In the diagram below, the left border edge is the left edge of the blue padding area. So the value returned by x would be the distance from that point to the left edge of the content area.

Diagram showing the relationships between the various boxes associated with an element

注意： x property is only valid if the computed value of the image's display property is either table-column or table-column-group ; in other words, either of those are set directly on the <img> or they're inherited from a containing element or by being located within a column described by either <col> or <colgroup> .

范例

The example below demonstrates the use of the HTMLImageElement properties x and y .

HTML

In this example, we see a table showing information about users of a web site, including their user ID, their full name, and their avatar image.

<table id="userinfo">
  <colgroup>
    <col span="2" class="group1">
    <col>
  </colgroup>
  <tr>
    <th>UserID</th>
    <th>Name</th>
    <th>Avatar</th>
  </tr>
  <tr>
    <td>12345678</td>
    <td>Johnny Rocket</td>
    <td><img src="https://interactive-examples.mdn.mozilla.net/media/examples/grapefruit-slice-332-332.jpg"</td>
  </th>
</table>
<pre id="log">
</pre>

JavaScript

The JavaScript code that fetches the image from the table and looks up its x and y values is below.

let logBox = document.querySelector("pre");
let tbl = document.getElementById("userinfo")
let log = msg => {
  logBox.innerHTML += `${msg}<br>`;
}
let cell = tbl.rows[1].cells[2];
let image = cell.querySelector("img");
log(`Image's global X: ${image.x}`);
log(`Image's global Y: ${image.y}`);

This uses the <table> 's rows property to get a list of the rows in the table, from which it looks up row 1 (which, being a zero-based index, means the second row from the top). Then it looks at that <tr> (table row) element's cells property to get a list of the cells in that row. The third cell is taken from that row (once again, specifying 2 as the zero-based offset).

From there, we can get the <img> element itself from the cell by calling querySelector() 在 HTMLTableCellElement representing that cell.

Finally, we can look up and display the values of the HTMLImageElement 's x and y 特性。

CSS

The CSS defining the appearance of the table:

.group1 {
  background-color: #d7d9f2;
}
table {
  border-collapse: collapse;
  border: 2px solid rgb(100, 100, 100);
  font-family: sans-serif;
}
td, th {
  border: 1px solid rgb(100, 100, 100);
  padding: 10px 14px;
}
td > img {
  max-width: 4em;
}

结果

The resulting table looks like this:

规范

规范	状态	注释
CSSOM (CSS 对象模型) 视图模块 The definition of 'HTMLImageElement.x' in that specification.	工作草案

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`x`	Chrome 1	Edge 12	Firefox 14 14 不支持 ? — 7	IE No	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 14 14 不支持 ? — 7	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持
不支持

元数据

最后修改： Feb 22, 2020

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值

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HTML

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规范

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