diff --git a/main.js b/main.js
index 2dcdd25..e39241f 100644
--- a/main.js
+++ b/main.js
@@ -51,10 +51,6 @@ function evaluate() {
 	}, 500);
 }
 
-const expr = document.querySelector("#expr");
-let selectionStart = 0;
-let selectionEnd = 0;
-
 function setupExprInput() {
 	selectionStart = expr.selectionStart;
 	selectionEnd = expr.selectionEnd;
@@ -121,6 +117,10 @@ function switchInputs(enabled) {
 	document.querySelector("#modulus").disabled = !enabled;
 }
 
+const expr = document.querySelector("#expr");
+let selectionStart = 0;
+let selectionEnd = 0;
+
 let timeoutId = null;
 const worker = new Worker("./workers/compute.js");
 worker.addEventListener("message", (message) => {