diff --git a/utils/javascript/SortedList.mjs b/utils/javascript/SortedList.mjs
new file mode 100644
index 0000000..84985d0
--- /dev/null
+++ b/utils/javascript/SortedList.mjs
@@ -0,0 +1,65 @@
+export class SortedList {
+
+	#data = [];
+
+	add(value) {
+
+		// Simple cases that we can short-circuit on
+		if (this.#data.length === 0 || this.#data.at(-1) < value) {
+			this.#data.push(value);
+			return;
+		};
+		if (this.#data.at(0) > value) {
+			this.#data.unshift(value);
+			return
+		};
+
+		let locationToAdd;
+		let lStart = 0;
+		let lEnd = this.#data.length;
+		do {
+			let midpoint = Math.floor((lStart + lEnd) / 2);
+
+			if (lStart > lEnd) {
+				// console.log(`breaking for ${value} at lStart=${lStart}, lEnd=${lEnd}`)
+				locationToAdd = lStart;
+				break
+			};
+
+			let valAtMidpoint =this.#data.at(midpoint);
+			if (valAtMidpoint < value) {
+				// console.log(`${valAtMidpoint} < ${value}, using second half of list`)
+				lStart = midpoint + 1;
+			}
+			else if (valAtMidpoint > value) {
+				// console.log(`${valAtMidpoint} > ${value}, using first half of list`)
+				lEnd = midpoint - 1;
+			}
+			else {
+				locationToAdd = midpoint;
+			}
+		} while (locationToAdd === undefined);
+
+		// console.log(`locationToAdd (${value}) = ${locationToAdd}`);
+		this.#data.splice(locationToAdd, 0, value);
+	};
+
+	get size() {
+		return this.#data.length;
+	}
+
+	at(index) {
+		return this.#data.at(index);
+	}
+
+	*iter() {
+		// console.log(JSON.stringify(this.#data))
+		const size = this.#data.length;
+		for (var i = 0; i < size; i++) {
+			// if (i === size - 1) {
+			// 	yield this.#data[i]
+			// }
+			yield this.#data[i];
+		}
+	};
+}
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