keep selected sender from hash until user selects others

src/App.svelte

@@ -15,6 +15,7 @@
   let loading = false
   let need_update_title = false
   let sender
+  let selected_init
 
   setContext('LUOXU_URL', LUOXU_URL)
 
@@ -79,6 +80,7 @@
       }
       if(info.has('sender')) {
         sender = info.get('sender')
+        selected_init = sender
       }
       if((group || islocal) && query) {
         result = null
@@ -176,7 +178,7 @@
       on:input={() => error = ''}
       on:keydown={e => {if(e.key == 'Enter'){do_search()}}}
     />
-    <Name group={group} bind:selected={sender}/>
+    <Name group={group} bind:selected={sender} selected_init={selected_init}/>
     <button on:click={() => do_search()}>搜索</button>
   </div>
 

src/Name.svelte

@@ -4,6 +4,7 @@
   export let group
 
   export let selected
+  export let selected_init
   let selected_name = ''
   let selected_idx
 
@@ -76,16 +77,17 @@
     selected = names[selected_idx][0]
     selected_name = names[selected_idx][1]
     input.value = selected_name
+    selected_init = null
   }
 
   function update_value() {
-    if(!selected) {
+    if(!selected || selected === selected_init) {
       return
     }
     if(input.value) {
       input.value = selected_name
     }else{
-      selected = null
+      selected = selected_init
       selected_name = ''
     }
   }
@@ -118,7 +120,7 @@
       }
     }
   }
-// TODO: NOT operator
+
 </script>
 
 <div>