摘要：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="wi 阅读全文
摘要：
App.vue <template> <div id="heart" @click="toggleFlag"> <span :class="{active:flag}"></span> <span :class="{active:flag}"></span> </div> </template> < 阅读全文