通过 JavaScript 更改字体

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时间:2020-08-24 05:36:27  来源:igfitidea点击:

Font-Face changing via JavaScript

javascriptcssfontsfont-face

提问by Ry-

So the basic workflow is this:

所以基本的工作流程是这样的:

  1. Asynchronous file upload of a font (this is already done).

  2. Get the URL (done).

  3. Change the font to the new URL.

  1. 字体的异步文件上传(这已经完成)。

  2. 获取 URL(完成)。

  3. 将字体更改为新 URL。

I realize this needs to be done via font-face, but I can't seem to figure out how to access that via JavaScript.

我意识到这需要通过 font-face 来完成,但我似乎无法弄清楚如何通过 JavaScript 访问它。

回答by Ry-

You can create a new <style>element with the @font-facerule and append it to the document's head:

您可以<style>使用@font-face规则创建一个新元素并将其附加到document's head

var newStyle = document.createElement('style');
newStyle.appendChild(document.createTextNode("\
@font-face {\
    font-family: " + yourFontName + ";\
    src: url('" + yourFontURL + "') format('yourFontFormat');\
}\
"));

document.head.appendChild(newStyle);

Of course, you'll probably need to provide all the necessary font formats and URLs, too, unless you're only worried about support for modern desktop browsers (in which case you would just use WOFF – I assume that's reasonable, because of the other features you mentioned).

当然,您可能还需要提供所有必要的字体格式和 URL,除非您只担心对现代桌面浏览器的支持(在这种情况下,您将只使用 WOFF——我认为这是合理的,因为您提到的其他功能)。

回答by Cybernetic

Define a FontFace object:

定义一个 FontFace 对象

new_font = new FontFace('conthrax', 'url(fonts/conthrax-sb.ttf)')

Call its load method to download the font:

调用它的 load 方法来下载字体

new_font.load().then(function(loaded_face) {
    // use font here

}).catch(function(error) {

});

... this returns a Promise, which when resolved passes the loaded FontFace.

...这将返回一个 Promise,它在解析时传递加载的 FontFace。

Add the loaded font to the document:

将加载的字体添加到文档中

new_font.load().then(function(loaded_face) {
    // use font here
    document.fonts.add(loaded_face)
}).catch(function(error) {

});

Use the font as needed (e.g. in Azle):

根据需要使用字体(例如在Azle 中

az.style_text('my_title', 1, {
    "font-family" : "conthrax"
})