Created
October 18, 2019 08:07
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SNIPPET: Display tooltips w/DOM-inspection info about the selected/hovered element
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// sauce: https://dev.to/eaich/spy-on-the-dom-3d47 | |
(function SpyOn() { | |
const _id = 'spyon-container', | |
_posBuffer = 3; | |
function init() { | |
document.body.addEventListener('mousemove', glide); | |
document.body.addEventListener('mouseover', show); | |
document.body.addEventListener('mouseleave', hide); | |
} | |
function hide(e) { | |
document.getElementById(_id).style.display = 'none'; | |
} | |
function show(e) { | |
const spyContainer = document.getElementById(_id); | |
if (!spyContainer) { | |
create(); | |
return; | |
} | |
if (spyContainer.style.display !== 'block') { | |
spyContainer.style.display = 'block'; | |
} | |
} | |
function glide(e) { | |
const spyContainer = document.getElementById(_id); | |
if (!spyContainer) { | |
create(); | |
return; | |
} | |
const left = e.clientX + getScrollPos().left + _posBuffer; | |
const top = e.clientY + getScrollPos().top + _posBuffer; | |
spyContainer.innerHTML = showAttributes(e.target); | |
if (left + spyContainer.offsetWidth > window.innerWidth) { | |
spyContainer.style.left = left - spyContainer.offsetWidth + 'px'; | |
} else { | |
spyContainer.style.left = left + 'px'; | |
} | |
spyContainer.style.top = top + 'px'; | |
} | |
function getScrollPos() { | |
const ieEdge = document.all ? false : true; | |
if (!ieEdge) { | |
return { | |
left : document.body.scrollLeft, | |
top : document.body.scrollTop | |
}; | |
} else { | |
return { | |
left : document.documentElement.scrollLeft, | |
top : document.documentElement.scrollTop | |
}; | |
} | |
} | |
function showAttributes(el) { | |
const nodeName = `<span style="font-weight:bold;">${el.nodeName.toLowerCase()}</span><br/>`; | |
const attrArr = Array.from(el.attributes); | |
const attributes = attrArr.reduce((attrs, attr) => { | |
attrs += `<span style="color:#ffffcc;">${attr.nodeName}</span>="${attr.nodeValue}"<br/>`; | |
return attrs; | |
}, ''); | |
return nodeName + attributes; | |
} | |
function create() { | |
const div = document.createElement('div'); | |
div.id = _id; | |
div.setAttribute('style', ` | |
position: absolute; | |
left: 0; | |
top: 0; | |
width: auto; | |
height: auto; | |
padding: 10px; | |
box-sizing: border-box; | |
color: #fff; | |
background-color: #444; | |
z-index: 100000; | |
font-size: 12px; | |
border-radius: 5px; | |
line-height: 20px; | |
max-width: 45%; | |
` | |
); | |
document.body.appendChild(div); | |
} | |
init(); | |
})(); |
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