不。这根本不可能。

不。这根本不可能。

我已经使用了这个，它似乎与outlook工作，不使用html，但你可以格式化文本与换行符，至少当正文被添加为输出。

<a href="mailto:email@address.com?subject=Hello world&body=Line one%0DLine two">Email me</a>

虽然不可能使用HTML来格式化你的电子邮件正文，你可以添加换行符，就像之前建议的那样。

如果你能够使用javascript，那么“encodeURIComponent()”可能会像下面这样使用…

var formattedBody = "FirstLine \n Second Line \n Third Line";
var mailToLink = "mailto:x@y.com?body=" + encodeURIComponent(formattedBody);
window.location.href = mailToLink;

It is worth pointing out that on Safari on the iPhone, at least, inserting basic HTML tags such as <b>, <i>, and <img> (which ideally you shouldn't use in other circumstances anymore anyway, preferring CSS) into the body parameter in the mailto: does appear to work - they are honored within the email client. I haven't done exhaustive testing to see if this is supported by other mobile or desktop browser/email client combos. It's also dubious whether this is really standards-compliant. Might be useful if you are building for that platform, though.

正如其他响应所指出的，在将encodeURIComponent嵌入到mailto:链接之前，还应该在整个正文上使用encodeURIComponent。

任何人都可以尝试以下(mailto函数只接受明文，但在这里我展示如何使用HTML内文属性，以及如何添加锚作为mailto主体参数):

//Create as many html elements you need.

const titleElement = document.createElement("DIV");
titleElement.innerHTML = this.shareInformation.title; // Just some string

//Here I create an <a> so I can use href property
const titleLinkElement = document.createElement("a");
titleLinkElement.href = this.shareInformation.link; // This is a url

...

let mail = document.createElement("a");

// Using es6 template literals add the html innerText property and anchor element created to mailto body parameter
mail.href = 
  `mailto:?subject=${titleElement.innerText}&body=${titleLinkElement}%0D%0A${abstractElement.innerText}`;
mail.click();

// Notice how I use ${titleLinkElement} that is an anchor element, so mailto uses its href and renders the url I needed