如何判断元素是使用Java脚本还是工具建立了新的块格式上下文? [英] How can I tell whether an element establishes a new block formatting context using Javascript or a tool?
问题描述
某些元素建立了新的以获取更多信息.
除此之外，在以前的问题中还有一些有趣的建议，例如，讨论我认为大致相同的问题.
Some elements establish a new block formatting context, depending on whether they meet certain conditions. Understanding this is quite important to be able to use floats correctly in CSS, among other things.
I would like a tool to see whether a given element does establish a new block formatting context. An additional line of text in the inspector tool of Firefox like this would be ideal: Apparently, a tool like this does not exist.
If since something like this doesn't already exist in a browser, I would like to develop an extension that does this myself, and to do that, I will need to be able look at each element using Javascript. Is there a DOM API call that will tell me whether a certain element establishes a new block formatting context? Something like this would be ideal:
var res = doesElementEstablishNewBlockFormattingContext(document.getElementById("foo"));
If not, I could check with Javascript whether all the conditions are met, but that would be a last resort.
TLDR: Is there already a tool or extension or an API call that will tell me if an an element establishes a new block formatting context?
Something like this, but not exactly this, exists in Internet Explorer. As a proprietary part of the IE rendering engine the hasLayout property is used. It corresponds, roughly, to the creation of a new block formatting context.
console.log(document.getElementById("id").currentStyle.hasLayout) will show you what IE thinks. Read this blog post for more information.
Aside from that, there are some interesting suggestions in previous questions like this one, discussing what I think is roughly the same problem.
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