從后臺(tái)獲取數(shù)據(jù) 如果數(shù)據(jù)是“4”前臺(tái)顯示“04” 如果后臺(tái)是“04” 前臺(tái)就顯示“04”我代碼：$(".ball_1").html(data.ball_1>=10||data.ball_1.length=3data.ball_1:'0'+data.bal_1||data.ball_1.substring(1));直接報(bào)錯(cuò)$(".ball_1").html(data.ball_1>=10?data.ball_1:'0'+data.ball_1&&data.ball_1.length>=3?data.ball_1.substring(1)?data.ball_1);如果這樣數(shù)據(jù)是“4” 就顯示4 請(qǐng)問這個(gè)功能應(yīng)該怎么實(shí)現(xiàn)