The avatar for @julesblm
Jules Blom
Interested in data visualisation, maps, JavasScript, and geology
Published
Edited
Oct 15, 2021
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searchParamsString = new URLSearchParams(
"?search=selection&topic=d3 selection'"
)
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searchParamsString.toString()
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new URLSearchParams("?search=selection&topic=d3 selection'").toString()
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searchParamsObject = new URLSearchParams({ search: 3, topic: "d3" })
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searchParamsObject.toString()
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// Pass in a sequence of pairs
URLSearchParamsArray = new URLSearchParams([
["search", "selection"],
["topic", "d3"]
])
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URLSearchParamsArray.getAll("search")
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// Pass in a sequence of pairs
URLSearchParamsMap = new URLSearchParams(
new Map([
["search", "selection"],
["topic", "d3"]
])
)
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URLSearchParamsMap.toString()
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URLSearchParamsMap.has("topic")
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URLSearchParamsMap.set("topic", "vega") // will overwrite current 'topic' ('d3')
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URLSearchParamsMap.getAll("topic")
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URLSearchParamsMap.get("jules")
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URLSearchParamsMap.toString()
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## Iterator

`URLSearchParams` supports the [iteratable protocol](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#the_iterable_protocol) so it directly be used in a `for of` loop.
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multipleSameKeySearchParams = new URLSearchParams([
["topic", ["d3"]],
["topic", ["vega"]],
["topic", ["JavaScript"]],
["topic", ["Observable Plot"]]
])
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multipleSameKeySearchParams.get("topic")
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multipleSameKeySearchParams.getAll("topic")
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{
multipleSameKeySearchParams.append("topic", "React");
return multipleSameKeySearchParams.getAll("topic");
}
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// multipleSameKeySearchParams.set("topic", "Jules!")
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multipleSameKeySearchParams.get("topic")
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