如何显示和合上更多隐藏内容的方法？

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javascriptgistfile1.txtcarryOut: function() { var that=this; var content=that.data.content; if (!that.data.isOpen) { content.ignature=ignatureText; that.setData({ content: content, isOpen: true, openText: 合上 }); }}

carryOut: function(){//显示和合上更多内容 var that = this; var content = that.data.content; if (that.data.isOpen == false){ content.ignature = ignatureText; that.setData({ content, isOpen:true, openText: "合上", }) } else if(that.data.isOpen == true){ content.ignature = ignatureText.substr(0, 64) + "..."; that.setData({ content, isOpen: false, openText: "展开", }) } },