Over 2 decades of experience on the Web…
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Edited
Aug 11, 2024
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eras
viewof eras = parse(data, {
callback: (d, _, cols) => {
const [c1, c2, c3] = cols;
const values = d3.autoType.call(null, [
d[c1],
d[c2].replace(/^-/, "-00"),
d[c3].replace(/^-/, "-00")
]);
return Object.fromEntries(values.map((_, i) => [cols[i], values[i]]));
},
dismiss: /* discard comments */ /^;.*$/gm,
display
})
parse = {
const meta = "data:,";
const object = Object.assign(html`<object>`, {
type: "text/plain",
width
});
return function (
data,
{
callback = void 0,
dismiss = /* always fails to match */ /(?!)/,
display = true,
method = "csvParse"
} = {}
) {
if (Array.isArray(data) && data.raw) {
data = interpolate(arguments);
}
const stash = Object.assign(
object.cloneNode(),
{
data: meta + encodeURIComponent(data)
},
!!display ? {} : { height: 0 }
);
return Object.assign(stash, {
value: d3[method](
decodeURIComponent(stash.data.slice(meta.length))
.replace(dismiss, "")
.replace(/^\s+?/gm, ""),
callback
),
onload() {
stash.dispatchEvent(new CustomEvent("input"));
}
});
};
}
// @see {@link https://leanpub.com/understandinges6/read#leanpub-auto-tagged-templates}
function interpolate(args) {
/*
* Many thanks to Addy Osmani, Andrea Giammarchi, and Nicholas Zakas! - mg
*/
return args[0].map((x, i) => x + (args[1 + i] || "")).join("");
}
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