javascript - 检查字符串以查看其是否为空

Question

if($(this).find("Dimension1").text()) is blank
display nothing
else if ($(this).find("Dimension1").text()) has a value
put a "x" before printing $(this).find("Dimension1").text()

所以它将是 "x"+ Dimension1

我怎么用javascript写这个

Answer 1

str= $(this).find("Dimension1").text();
if (str!="")
str = "x"+str;