1

  plus.runtime.openURL(this.url, function(res) {  
                    console.log(res);  
                }); 

2

   let _this = this;  
            // 判断平台  
            if (plus.os.name == 'Android') {  
                plus.runtime.launchApplication(  
                    {  
                        pname: 'com.taobao.taobao'  
                    },  
                    function(e) {  
                        console.log('Open system default browser failed: ' + e.message);  
                    }  
                );  
            } else if (plus.os.name == 'iOS') {  
                plus.runtime.launchApplication({ action: 'taobao://' }, function(e) {  
                    console.log('Open system default browser failed: ' + e.message);  
                });  
            } 

https://ask.dcloud.net.cn/article/35621