JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.
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You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.
If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.
You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.
HTML Settings
Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.
<div id="container">
<div class="item grey"></div>
<div class="item purple"></div>
<div class="item orange"></div>
<div class="item blue"></div>
</div>
#container{
display: grid;
width: 100%;
height: 350px;
grid-template-columns: [full-start] 1fr 1fr [full-end];
grid-template-rows: 100px 1fr 100px;
grid-gap: 20px;
}
.purple {
grid-row: span 2;
}
.blue {
grid-column: span 2;
}
const container = document.getElementById("container");
const inspector = document.createElement('div');
inspector.setAttribute('style', `
position: absolute;
height: ${container.offsetHeight}px;
width: ${container.offsetWidth}px;
top: ${container.offsetTop}px;
left: ${container.offsetLeft}px;
background: rgba(58, 250, 8, .5);
`);
document.body.appendChild(inspector);
// get the rows/columns/gaps
const styles = window.getComputedStyle(container);
const rows = styles.getPropertyValue("grid-template-rows");
const columns = styles.getPropertyValue("grid-template-columns");
const rowGap = styles.getPropertyValue("grid-row-gap");
const columnGap = styles.getPropertyValue("grid-column-gap");
// convert the rows and columns into a format we can work with
const columnData = parseGridTemplate(columns, columnGap);
const rowData = parseGridTemplate(rows, rowGap);
console.log("columnData", columnData);
console.log("rowData", rowData);
/*
Converts a grid template string into an array of grid line objects
Example input: "[full-start] 300px 300px [full-end]"
Example outut:
[{
"start": -1,
"end": 1,
"name": "full-start"
},
{
"start": 299,
"end": 301,
"name": null,
"gap": 20
},
{
"start": 619,
"end": 621,
"name": "full-end"
}]
*/
function parseGridTemplate(templateStr, gap = "0px") {
const gapSize = parseFloat(gap.replace("px", ""));
// splits at and space that isn't between two [ ] brackets
const parsedArray = templateStr.split(/\s(?![^[]*])/);
let lines = [];
let currentPosition = 0;
// add in any missing names as ""
// "200px [center-start] 300px [center-end] 400px" becomes:
// "'' 200px [center-start] 300px [center-end] 400px ''"
let allItems = [];
parsedArray.forEach((item, index) => {
if (item.includes("px")) {
// add a null name before it if missing
if (!parsedArray[index - 1] || parsedArray[index - 1].includes("px")) {
allItems.push("");
}
}
allItems.push(item);
});
// handle last item
if (parsedArray[parsedArray.length - 1].includes("px")) {
allItems.push("");
}
allItems.forEach((item, index) => {
if (item.includes("px")) {
const trackSize = parseFloat(item.replace("px", ""));
currentPosition += trackSize;
} else {
let newLine = {
start: currentPosition - 1,
end: currentPosition + 1,
name: getName(item)
};
// add gaps on just the inner lines
// and count it for positioning
if (index !== 0 && index !== allItems.length - 1 && gapSize !== 0) {
newLine.gap = gapSize;
currentPosition += gapSize;
}
lines.push(newLine);
}
});
return lines;
}
function getName(item) {
return item.includes("[") ? item.match(/\[(.*)\]/)[1].trim() : null;
}
Also see: Tab Triggers