Introduced clear all button

javascript/homeworkVocabularyTask.js

@@ -14,6 +14,8 @@ class HomeworkVocabularyTask extends HomeworkElement {
     this.setAttribute("state", "edit")
     this.deleteButton = this.querySelector('img#delete')
     this.deleteButton.addEventListener("click", this.deleteTask.bind(this))
+    this.sourceText = this.querySelector("input#source")
+    this.targetText = this.querySelector("input#target")
   }
 
   connectedCallback() {
@@ -28,5 +30,13 @@ class HomeworkVocabularyTask extends HomeworkElement {
   getId() {
     return this.id
   }
+
+  setSourceText(text) {
+    this.sourceText.value = text
+  }
+
+  setTargetText(text) {
+    this.targetText.value = text
+  }
 }
 customElements.define('homework-vocabulary-task', HomeworkVocabularyTask)