diff --git a/dev/src/RegExr.js b/dev/src/RegExr.js
index f3c8d055..f082ae2f 100644
--- a/dev/src/RegExr.js
+++ b/dev/src/RegExr.js
@@ -65,8 +65,8 @@ export default class RegExr extends EventDispatcher {
 			params = {};
 		}
 		if (params.engine) { this.flavor.value = params.engine; }
-		if (params.expression) { this.expression.value = params.expression; }
-		if (params.text) { this.text.value = params.text; }
+		if (params.expression !== undefined) { this.expression.value = params.expression; }
+		if (params.text !== undefined) { this.text.value = params.text; }
 		if (params.tool) { this.tools.value = {id:params.tool, input:params.input}; }
 
 		window.onbeforeunload = (e) => this.unsaved ? "You have unsaved changes." : null;
diff --git a/dev/src/views/Expression.js b/dev/src/views/Expression.js
index c9d45717..08ce6281 100644
--- a/dev/src/views/Expression.js
+++ b/dev/src/views/Expression.js
@@ -43,7 +43,7 @@ export default class Expression extends EventDispatcher {
 	}
 	
 	set value(expression) {
-		let regex = Utils.decomposeRegEx(expression || Expression.DEFAULT_EXPRESSION, this.delim);
+		let regex = Utils.decomposeRegEx(expression ?? Expression.DEFAULT_EXPRESSION, this.delim);
 		this.pattern = regex.source;
 		this.flags = regex.flags;
 	}
diff --git a/dev/src/views/Text.js b/dev/src/views/Text.js
index 0e3bb19b..b4971e5e 100644
--- a/dev/src/views/Text.js
+++ b/dev/src/views/Text.js
@@ -47,7 +47,7 @@ export default class Text extends EventDispatcher {
 	}
 	
 	set value(val) {
-		this.editor.setValue(val || this.defaultText);
+		this.editor.setValue(val ?? this.defaultText);
 	}
 	
 	get value() {