diff --git a/src/compiler/compile/render_dom/index.ts b/src/compiler/compile/render_dom/index.ts
index 52006e4d8a..4895c97748 100644
--- a/src/compiler/compile/render_dom/index.ts
+++ b/src/compiler/compile/render_dom/index.ts
@@ -248,6 +248,11 @@ export default function dom(
 							code.appendLeft(node.end, `${code.original[node.end - 1] === ';' ? '' : ';'} ${insert};`);
 						}
 
+						pending_assignments = new Set();
+					} else if (parent && parent.type !== 'ForStatement' && node.type === 'VariableDeclaration') {
+						const insert = Array.from(pending_assignments).map(name => component.invalidate(name)).join('; ');
+
+						code.appendLeft(node.end, `${code.original[node.end - 1] === ';' ? '' : ';'} ${insert};`);
 						pending_assignments = new Set();
 					}
 				}
diff --git a/test/js/samples/declaration-assignment-emersion/expected.js b/test/js/samples/declaration-assignment-emersion/expected.js
new file mode 100644
index 0000000000..f3ad073ec6
--- /dev/null
+++ b/test/js/samples/declaration-assignment-emersion/expected.js
@@ -0,0 +1,72 @@
+/* generated by Svelte vX.Y.Z */
+import {
+	SvelteComponent,
+	append,
+	detach,
+	element,
+	init,
+	insert,
+	noop,
+	safe_not_equal,
+	set_data,
+	space,
+	text
+} from "svelte/internal";
+
+function create_fragment(ctx) {
+	var h1, t0, t1, t2;
+
+	return {
+		c() {
+			h1 = element("h1");
+			t0 = text(ctx.foo);
+			t1 = space();
+			t2 = text(ctx.eid);
+		},
+
+		m(target, anchor) {
+			insert(target, h1, anchor);
+			append(h1, t0);
+			append(h1, t1);
+			append(h1, t2);
+		},
+
+		p(changed, ctx) {
+			if (changed.foo) {
+				set_data(t0, ctx.foo);
+			}
+
+			if (changed.eid) {
+				set_data(t2, ctx.eid);
+			}
+		},
+
+		i: noop,
+		o: noop,
+
+		d(detaching) {
+			if (detaching) {
+				detach(h1);
+			}
+		}
+	};
+}
+
+function instance($$self, $$props, $$invalidate) {
+	let eid = 1;
+  let foo;
+  let employees = [
+    {id: eid = (foo = 2), name: 'xxx'},
+  ]; $$invalidate('foo', foo); $$invalidate('eid', eid);
+
+	return { eid, foo };
+}
+
+class Component extends SvelteComponent {
+	constructor(options) {
+		super();
+		init(this, options, instance, create_fragment, safe_not_equal, []);
+	}
+}
+
+export default Component;
diff --git a/test/js/samples/declaration-assignment-emersion/input.svelte b/test/js/samples/declaration-assignment-emersion/input.svelte
new file mode 100644
index 0000000000..dec1a490af
--- /dev/null
+++ b/test/js/samples/declaration-assignment-emersion/input.svelte
@@ -0,0 +1,9 @@
+<script>
+  let eid = 1;
+  let foo;
+  let employees = [
+    {id: eid = (foo = 2), name: 'xxx'},
+  ]
+</script>
+
+<h1>{foo} {eid}</h1>
diff --git a/test/js/samples/declaration-assignment-for/expected.js b/test/js/samples/declaration-assignment-for/expected.js
new file mode 100644
index 0000000000..11719d7cb6
--- /dev/null
+++ b/test/js/samples/declaration-assignment-for/expected.js
@@ -0,0 +1,68 @@
+/* generated by Svelte vX.Y.Z */
+import {
+	SvelteComponent,
+	append,
+	detach,
+	element,
+	init,
+	insert,
+	noop,
+	safe_not_equal,
+	set_data,
+	space,
+	text
+} from "svelte/internal";
+
+function create_fragment(ctx) {
+	var h1, t0, t1, t2;
+
+	return {
+		c() {
+			h1 = element("h1");
+			t0 = text(ctx.foo1);
+			t1 = space();
+			t2 = text(ctx.foo2);
+		},
+
+		m(target, anchor) {
+			insert(target, h1, anchor);
+			append(h1, t0);
+			append(h1, t1);
+			append(h1, t2);
+		},
+
+		p(changed, ctx) {
+			if (changed.foo1) {
+				set_data(t0, ctx.foo1);
+			}
+		},
+
+		i: noop,
+		o: noop,
+
+		d(detaching) {
+			if (detaching) {
+				detach(h1);
+			}
+		}
+	};
+}
+
+function instance($$self, $$props, $$invalidate) {
+	let foo1;
+  let foo2;
+  for (let bar = (foo1 = 0); bar < 5; bar += 1) {
+    $$invalidate('foo1', foo1 = foo2); $$invalidate('foo1', foo1);
+  }
+
+	return { foo1, foo2 };
+}
+
+class Component extends SvelteComponent {
+	constructor(options) {
+		super();
+		init(this, options, instance, create_fragment, safe_not_equal, []);
+	}
+}
+
+export default Component;
diff --git a/test/js/samples/declaration-assignment-for/input.svelte b/test/js/samples/declaration-assignment-for/input.svelte
new file mode 100644
index 0000000000..273489c966
--- /dev/null
+++ b/test/js/samples/declaration-assignment-for/input.svelte
@@ -0,0 +1,9 @@
+<script>
+  let foo1;
+  let foo2;
+  for (let bar = (foo1 = 0); bar < 5; bar += 1) {
+    foo1 = foo2;
+  }
+</script>
+
+<h1>{foo1} {foo2}</h1>
diff --git a/test/js/samples/declaration-assignment/expected.js b/test/js/samples/declaration-assignment/expected.js
new file mode 100644
index 0000000000..61e649bad0
--- /dev/null
+++ b/test/js/samples/declaration-assignment/expected.js
@@ -0,0 +1,65 @@
+/* generated by Svelte vX.Y.Z */
+import {
+	SvelteComponent,
+	append,
+	detach,
+	element,
+	init,
+	insert,
+	noop,
+	safe_not_equal,
+	set_data,
+	space,
+	text
+} from "svelte/internal";
+
+function create_fragment(ctx) {
+	var h1, t0, t1, t2;
+
+	return {
+		c() {
+			h1 = element("h1");
+			t0 = text(ctx.foo);
+			t1 = space();
+			t2 = text(ctx.bar);
+		},
+
+		m(target, anchor) {
+			insert(target, h1, anchor);
+			append(h1, t0);
+			append(h1, t1);
+			append(h1, t2);
+		},
+
+		p(changed, ctx) {
+			if (changed.foo) {
+				set_data(t0, ctx.foo);
+			}
+		},
+
+		i: noop,
+		o: noop,
+
+		d(detaching) {
+			if (detaching) {
+				detach(h1);
+			}
+		}
+	};
+}
+
+function instance($$self, $$props, $$invalidate) {
+	let foo;
+	let bar = (foo = 1); $$invalidate('foo', foo);
+
+	return { foo, bar };
+}
+
+class Component extends SvelteComponent {
+	constructor(options) {
+		super();
+		init(this, options, instance, create_fragment, safe_not_equal, []);
+	}
+}
+
+export default Component;
diff --git a/test/js/samples/declaration-assignment/input.svelte b/test/js/samples/declaration-assignment/input.svelte
new file mode 100644
index 0000000000..8aa05964dd
--- /dev/null
+++ b/test/js/samples/declaration-assignment/input.svelte
@@ -0,0 +1,6 @@
+<script>
+	let foo;
+	let bar = (foo = 1);
+</script>
+
+<h1>{foo} {bar}</h1>
diff --git a/test/js/samples/declaration-no-assignment/expected.js b/test/js/samples/declaration-no-assignment/expected.js
new file mode 100644
index 0000000000..f96cf01829
--- /dev/null
+++ b/test/js/samples/declaration-no-assignment/expected.js
@@ -0,0 +1,70 @@
+/* generated by Svelte vX.Y.Z */
+import {
+	SvelteComponent,
+	append,
+	detach,
+	element,
+	init,
+	insert,
+	noop,
+	safe_not_equal,
+	set_data,
+	space,
+	text
+} from "svelte/internal";
+
+function create_fragment(ctx) {
+	var h1, t0, t1, t2;
+
+	return {
+		c() {
+			h1 = element("h1");
+			t0 = text(ctx.foo);
+			t1 = space();
+			t2 = text(ctx.bar);
+		},
+
+		m(target, anchor) {
+			insert(target, h1, anchor);
+			append(h1, t0);
+			append(h1, t1);
+			append(h1, t2);
+		},
+
+		p(changed, ctx) {
+			if (changed.foo) {
+				set_data(t0, ctx.foo);
+			}
+
+			if (changed.bar) {
+				set_data(t2, ctx.bar);
+			}
+		},
+
+		i: noop,
+		o: noop,
+
+		d(detaching) {
+			if (detaching) {
+				detach(h1);
+			}
+		}
+	};
+}
+
+function instance($$self, $$props, $$invalidate) {
+	let foo;
+  let bar;
+  $$invalidate('bar', bar = (foo = 1)); $$invalidate('foo', foo);
+
+	return { foo, bar };
+}
+
+class Component extends SvelteComponent {
+	constructor(options) {
+		super();
+		init(this, options, instance, create_fragment, safe_not_equal, []);
+	}
+}
+
+export default Component;
diff --git a/test/js/samples/declaration-no-assignment/input.svelte b/test/js/samples/declaration-no-assignment/input.svelte
new file mode 100644
index 0000000000..2f83d54a56
--- /dev/null
+++ b/test/js/samples/declaration-no-assignment/input.svelte
@@ -0,0 +1,7 @@
+<script>
+  let foo;
+  let bar;
+  bar = (foo = 1);
+</script>
+
+<h1>{foo} {bar}</h1>