diff --git a/components/BTextField.tsx b/components/BTextField.tsx
index f7d0ed8..82536da 100644
--- a/components/BTextField.tsx
+++ b/components/BTextField.tsx
@@ -29,7 +29,7 @@ type Props<T extends keyof TextType> = {
     fullwidth?: boolean;
     disabled?: boolean;
     children?: ComponentChildren;
-    set_value?: (v: TextType[T]) => void;
+    set_value?: (v?: TextType[T]) => void;
     min?: DataType[T];
     max?: DataType[T];
     outlined?: boolean;
@@ -78,7 +78,7 @@ export default class BTextField<T extends keyof TextType>
             }
         }
     }
-    set_value(value: TextType[T]) {
+    set_value(value?: TextType[T]) {
         if (this.props.set_value) {
             this.props.set_value(value);
         } else if (this.context) {
@@ -108,16 +108,15 @@ export default class BTextField<T extends keyof TextType>
                 const t = b as HTMLElement;
                 const d = t.querySelector("input");
                 if (d) {
-                    const n = this.get_value(d);
-                    if (typeof n === "number" && isNaN(n)) return undefined;
-                    return n;
+                    return this.get_value(d);
                 }
             }
         }
         return undefined;
     }
-    get_value(e: HTMLInputElement): TextType[T] {
+    get_value(e: HTMLInputElement): TextType[T] | undefined {
         const type = this.props.type;
+        if (!e.value.length) return undefined;
         // @ts-ignore Checked
         if (type === "text" || type === "password") return e.value;
         // @ts-ignore Checked
diff --git a/components/NewTask.tsx b/components/NewTask.tsx
index dabadcb..3dd1ea2 100644
--- a/components/NewTask.tsx
+++ b/components/NewTask.tsx
@@ -74,24 +74,26 @@ export default class NewTask extends Component<NewTaskProps, State> {
             }
         }, [task_type]);
         if (task_type === TaskType.Download) {
-            const set_url: StateUpdater<string> = (u) => {
-                const n = typeof u === "string" ? u : u(url || "");
+            const set_url: StateUpdater<string | undefined> = (u) => {
+                const n = typeof u === "string" ? u : u ? u(url) : u;
                 set_url1(n);
-                const p = parseUrl(n);
-                if (p && p.type !== UrlType.Single) {
-                    set_dgid(p.gid);
-                    set_token1(p.token);
+                if (n) {
+                    const p = parseUrl(n);
+                    if (p && p.type !== UrlType.Single) {
+                        set_dgid(p.gid);
+                        set_token1(p.token);
+                    }
                 }
             };
-            const set_dgid: StateUpdater<number> = (u) => {
-                const g = typeof u === "number" ? u : u(dgid || 0);
+            const set_dgid: StateUpdater<number | undefined> = (u) => {
+                const g = typeof u === "number" ? u : u ? u(dgid) : u;
                 set_dgid1(g);
                 if (g && token) {
                     set_url1(`https://e-hentai.org/g/${g}/${token}/`);
                 }
             };
-            const set_token: StateUpdater<string> = (u) => {
-                const n = typeof u === "string" ? u : u(url || "");
+            const set_token: StateUpdater<string | undefined> = (u) => {
+                const n = typeof u === "string" ? u : u ? u(url) : u;
                 set_token1(n);
                 if (dgid && n) {
                     set_url1(`https://e-hentai.org/g/${dgid}/${n}/`);
@@ -228,10 +230,10 @@ export default class NewTask extends Component<NewTaskProps, State> {
                     set_abort(undefined);
                 });
             };
-            const set_ezgid = (g: number) => {
+            const set_ezgid = (g: number | undefined) => {
                 if (abort) abort.abort();
                 set_ezgid1(g);
-                if (!isNaN(g)) fetch_ginfo(g);
+                if (g !== undefined && !isNaN(g)) fetch_ginfo(g);
             };
             let ginfo_div = null;
             if (ginfo?.ok) {