然後作為一個計時器可是總是顯示undefined 小米手環文件 https://cdn.discordapp.com/attachments/1132882463522312204/1132987644255670322/helloworld_pro.bin ``` var time_val; var go_timer; var stop_time = 0; function add_zero(num, digit) { let numString = String(num) while (numString.length < digit) { numString = "0" + numString } return numString } function timers() { if (true) { let temp_timer = new Date().getTime() - go_timer; let day = add_zero(Math.floor(temp_timer / (24 * 60 * 60 * 1000)), 2); let hours = add_zero(Math.floor((temp_timer % (24 * 60 * 60 * 1000)) / (60 * 60 * 1000)), 2); let minutes = add_zero(Math.floor((temp_timer % (60 * 60 * 1000)) / (60 * 1000)), 2); let seconds = add_zero(Math.floor((temp_timer % (60 * 1000)) / 1000), 2); let milliseconds = add_zero(temp_timer % 1000, 3); return [day, hours, minutes, seconds, milliseconds]; } }
go_timer = new Date().getTime(); time_val = setInterval(() => { var time = timers(); console.log(time[0] + "天\n" + time[1] + "時\n" + time[2] + "分\n" + time[3] + "秒\n" + time[4] + "毫秒"); }, 1); /* undefined天 undefined時 undefined分 undefined秒 undefined毫秒 */
1) --- 會變成分隔線（上一行必須是空白）
2) # 會變成一級標題
3) ## 會變成二級標題
4) ### 會變成三級標題
5) **粗體文字**會顯示粗體文字
6) ```當第一行與最後一行會顯示程式碼
7) 請搜尋 Markdown 語法，了解各種格式
手錶上運行失敗``` var time_val; var go_timer; var stop_time = 0; function add_zero(num, digit) { let numString = String(num) while (numString.length < digit) { numString = "0" + numString } return numString }
go_timer = new Date(); time_val = setInterval(() => { let temp_timer = new Date().getTime() - go_timer.getTime(); let day = add_zero(Math.floor(temp_timer / 1000 / 60 / 60 / 24), 2); let hours = add_zero(Math.floor(temp_timer / 1000 / 60 / 60) % 24, 2); let minutes = add_zero(Math.floor(temp_timer / 1000 / 60) % 60, 2); let seconds = add_zero(Math.floor(temp_timer / 1000 % 60), 2); let milliseconds = add_zero(temp_timer % 1000, 3); var timers = [day, hours, minutes, seconds, milliseconds]; console.log(timers[0] + "天\n" + timers[1] + "時\n" + timers[2] + "分\n" + timers[3] + "秒\n" + timers[4] + "毫秒"); }, 1)
程式碼沒問題呀 我剛貼到 jsfiddle 跑很正常呀 https://jsfiddle.net/poopoo888888/aq25x3t6/