Can you please tell me why it's showing 'Undefined' after each response

[alexmathew11]

Why it's showing Undefined after each response? Plz tell me

    function random(lowerInteger, upperInteger) {
                        	 let choices = upperInteger - lowerInteger + 1;
                        	 return Math.floor(Math.random() * choices + lowerInteger);
                        }
                        
               
    var help=["tails","head];
var ustext = hmFS.SysProGetChars("textofuser");
                        if(ustext == undefined)ustext=""       
                            
                        hmUI.createWidget(hmUI.widget.BUTTON, {
                            x: 130,
                            y: 50,
                            w: 30,
                            h: 30,
                            radius: 3,
                            normal_color: 0x000000,
                            press_color: 0x494949,
                            color: 0xfe8e40F,
                            text_size: 25,
                            text: "Archive",
                            click_func: function () {
                            hmFS.SysProSetChars("textofuser", "");
                             hmApp.goBack()
                            
                            }
                        })
                         var charactersnum = hmUI.createWidget(hmUI.widget.TEXT, {
                            x: 0,
                            y: 50,
                            w: 120,
                            h: 492,
                            color: 0xffffff,
                            text_size: 20,
                            text_style: hmUI.text_style.NONE,
                            text: ustext.length + " Words",
                            align_h: hmUI.align.CENTER_H,
                        });
                        var textuser = hmUI.createWidget(hmUI.widget.TEXT, {
                            x: 0,
                            y: 90,
                            w: 192,
                            h: 602,
                            color: 0xffffff,
                            text_size: 20,
                            text_style: hmUI.text_style.WRAP,//wrap!!!
                            text: ustext
                        });
                        let keyboard = hmUI.createWidget(hmUI.widget.GROUP, {
                            x: 0,
                            y: 252,
                            w: 192,
                            h: 480,
                        })
                        var spacebutton = keyboard.createWidget(hmUI.widget.BUTTON, {
                            x: 1,
                            y: 100,
                            w: 180,
                            h: 50,
                            radius: 3,
                            normal_color: 0x000000,
                            press_color: 0x494949,
                            color: 0xfe8e40F,
                            text_size: 25,
                            text: "Hi, who are you?",
                            click_func: function () {
                               ustext = ustext + help[random(0, help.length)]
                                update();
                            }
                        })
var itemtoseeallbuttons = keyboard.createWidget(hmUI.widget.FILL_RECT, {
			    x: 20,
		        y: 250,
			    w: 10,
			    h: 10,
                            radius: 15,
			    color: 0x000000,
			    });
                        function update() {
                            charactersnum.setProperty(hmUI.prop.MORE, {
                                text: ustext.length + "words"
                            });
                            const { width, height } = hmUI.getTextLayout(ustext, {
                                text_size: 20,
                                text_width: 192
                            })
                            textuser.setProperty(hmUI.prop.MORE, { text: ustext, h: height })
                            if(height>162){
                                let more = Math.round(height-162)
                                hmApp.setLayerY(-more)
                                keyboard.setProperty(hmUI.prop.more,{y:252+more})
                            }
                            hmFS.SysProSetChars("textofuser", ustext)
                        }    
                        update() 

[MyoungXUE]

Hi, it is not recommended to use the SysProSetChars related API, if you need to use the storage function, it is recommended to refer to https://docs.zepp.com/docs/1.0/guides/best-practice/persistence-storage/